CN210501300U - Three-layer co-extrusion device for cast film - Google Patents
Three-layer co-extrusion device for cast film Download PDFInfo
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- CN210501300U CN210501300U CN201921229554.3U CN201921229554U CN210501300U CN 210501300 U CN210501300 U CN 210501300U CN 201921229554 U CN201921229554 U CN 201921229554U CN 210501300 U CN210501300 U CN 210501300U
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Abstract
The utility model discloses a three-layer co-extrusion device for cast film, which relates to the technical field of film production, and comprises a feeding mechanism and an extrusion mechanism arranged below the feeding mechanism, wherein the feeding mechanism comprises a slurry tank and a die head, the extrusion mechanism comprises an extrusion roller set, the extrusion roller set comprises a first extrusion roller and a second extrusion roller, a cast channel is arranged between the first extrusion roller and the second extrusion roller, the first extrusion roller and the second extrusion roller are both provided with a cooling cover, a refrigerant cavity is arranged in the cooling cover, a cooling cavity is arranged between the cooling cover and a roller body, the refrigerant cavity is provided with a plurality of through holes communicated with the cooling cavity, and a positive pressure air knife is arranged at the outlet of the cast channel; reduce the surface temperature of roll body through the cooling jacket, the extexine thick liquids is because of the low temperature on roll body surface and tentatively solidifies the design, makes the viscosity of outer thick liquids descend to avoid extexine thick liquids to peel off the occasionally residue adhesion on the squeeze roll, make things convenient for curtain coating membrane and squeeze roll separation.
Description
Technical Field
The utility model belongs to the technical field of the film production technique and specifically relates to a curtain coating membrane three-layer is crowded device altogether.
Background
The cast film is a non-stretching and non-oriented cast film produced by melt casting quenching, has high production speed and high yield, has extremely excellent transparency, glossiness, thickness uniformity and the like, and is widely applied to packaging of foods, medical supplies, textiles, flowers and daily necessities. The existing three-layer coextrusion equipment for the cast film directly enters the molten slurry into the extrusion part for extrusion bonding, and after the molten outer-layer slurry and the extrusion part are mutually butted, residues are stained on the extrusion part when the molten outer-layer slurry falls off, so that the film is not smooth, continuous concave points and the like can appear when the residues on the extrusion part are not cleared in time, and the physical properties of the cast film are damaged.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a three-layer co-extrusion device for cast films.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a curtain coating membrane three-layer is crowded device altogether, includes feed mechanism and sets up the extrusion mechanism in the feed mechanism below, wherein: the feeding mechanism comprises a slurry box and a die head, a first slurry cavity, a second slurry cavity and a third slurry cavity are arranged in the slurry box, and the die head comprises a first die head for discharging the first slurry cavity, a second die head for discharging the second slurry cavity and a third die head for discharging the third slurry cavity; the extrusion mechanism comprises an extrusion roller group, the extrusion roller group comprises a first extrusion roller and a second extrusion roller, a casting channel is arranged between the first extrusion roller and the second extrusion roller, a first die head is arranged above the first extrusion roller, a second die head is arranged right above the casting channel, a third die head is arranged above the second extrusion roller, the first extrusion roller and the second extrusion roller are both provided with cooling covers, cooling medium cavities are arranged in the cooling covers, cooling cavities are arranged between the cooling covers and the roller body, the cooling medium cavities are provided with a plurality of through holes communicated with the cooling cavities, and positive pressure air knives are arranged at outlets of the casting channels.
Wherein: the caliber D of the casting channel, the caliber D1 of the first die head, the caliber D2 of the second die head and the caliber D3 of the third die head meet the following conditions: d1+ D2+ D3 is not less than D.
Wherein: the first squeezing roller and the second squeezing roller are both provided with driving rollers.
Wherein: the first squeeze roll rotates clockwise and the second squeeze roll rotates counterclockwise.
The utility model has the advantages that: cooling covers are arranged on the outer sides of the first extrusion roller and the second extrusion roller, and the surface temperature of the roller body is reduced through the cooling covers, so that the first extrusion roller and the second extrusion roller are both driving rollers and cooling rollers; the external surface layer slurry in a molten state falls on the extrusion roller set, the external surface layer slurry is preliminarily solidified and shaped due to the low temperature on the surface of the roller body, and is extruded and bonded with the internal layer slurry when passing through the casting channel to form a preliminary casting film; after the sizing agent of the outer surface layer is preliminarily solidified and shaped, the viscosity of the sizing agent of the outer surface layer is reduced, so that residues are prevented from being adhered to the extrusion roller when the sizing agent of the outer surface layer is stripped, and the cast film is conveniently separated from the extrusion roller; and a positive pressure air knife is arranged at the outlet of the casting channel, and air is blown to the edge of the outlet of the casting channel through the positive pressure air knife so as to peel the casting film, further avoid the outer surface layer of the casting film from being adhered to the extrusion roller, and realize quick peeling.
Drawings
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is an enlarged schematic view at A;
figure 4 is a side schematic view of the squeeze roller set of the present invention;
fig. 5 is a schematic structural view of the cooling cover of the present invention.
Detailed Description
Referring to fig. 1 to 5, the present invention is implemented as follows: a three-layer co-extrusion device for a cast film comprises a support 3, a feeding mechanism 1 and an extrusion mechanism 2 arranged below the feeding mechanism 1, wherein the feeding mechanism 1 comprises a slurry box 11 and a die head, the slurry box 11 is internally divided into a plurality of slurry cavities through cavity walls, namely a first slurry cavity 13, a second slurry cavity 14 and a third slurry cavity 15, the first slurry cavity 13 and the third slurry cavity 15 are specifically used for containing slurry on the outer surface layer of the cast film, the second slurry cavity 14 is specifically used for containing slurry on the inner interlayer of the cast film, and the die head comprises a first die head 16 used for discharging the first slurry cavity 13, a second die head 17 used for discharging the second slurry cavity 14 and a third die head 18 used for discharging the third slurry cavity 15; the extrusion mechanism 2 comprises an extrusion roller group, the extrusion roller group comprises a first extrusion roller 21 and a second extrusion roller 22, a casting channel 23 is arranged between the first extrusion roller 21 and the second extrusion roller 22, as shown in fig. 2, the first die head 16 is arranged above the first extrusion roller 21, the second die head 17 is arranged right above the casting channel 23, the third die head 18 is arranged above the second extrusion roller 22, the first extrusion roller 21 and the second extrusion roller 22 are both provided with annular cooling hoods 24, cooling cavities 25 are arranged in the cooling hoods 24, cooling cavities 26 are arranged between the cooling hoods 24 and the roller body, the cooling cavities 25 are provided with a plurality of through holes 27 communicated with the cooling cavities 26, a positive pressure air knife 28 is arranged at an outlet of the casting channel 23, and an air port of the positive pressure air knife 28 faces the edge of the outlet of the casting channel 23; specifically, the support 3 is provided with a backing plate 31 for supporting the cooling cover 24, the backing plate 31 is provided with a gap 32 for the casting film to pass through, the casting film after extrusion bonding passes through the gap 32 to enter the next process, the cooling cover 24 is provided with a cooling medium by an external cold source 4, specifically, the cooling cover 24 is connected with the external cold source 4 through a pipeline, the cooling medium is specifically cold air compressed and cooled by an air compressor, and the cooling cover 24 is provided with a cooling medium inlet 29.
Further, the bore D of the casting passage 23, the bore D1 of the first die 16, the bore D2 of the second die 17 and the bore D3 of the third die 18 satisfy: d1+ D2+ D3 is more than or equal to D, and the caliber of the die head determines the thickness of the slurry curtain in the production process, so that the requirements of the caliber D1 of the first die head 16, the caliber D2 of the second die head 17 and the caliber D3 of the third die head 18 are more than or equal to D as shown in figure 3.
Further, the first squeezing roller 21 and the second squeezing roller 22 are both provided with driving rollers and are directly driven by a motor and a reduction gearbox.
Further, the first pressing roll 21 rotates clockwise, and the second pressing roll 22 rotates counterclockwise.
The utility model discloses a theory of operation: a cooling cover 24 is arranged on the outer side of the first squeezing roller 21 and the second squeezing roller 22, and the surface temperature of the roller body is reduced through the cooling cover 24, so that the first squeezing roller 21 and the second squeezing roller 22 are both driving rollers and cooling rollers; the external surface layer slurry in a molten state falls on the extrusion roller set, the external surface layer slurry is preliminarily solidified and shaped due to the low temperature of the surface of the roller body, and is extruded and bonded with the internal layer slurry when passing through the casting channel 23 to form a preliminary casting film; after the sizing agent of the outer surface layer is preliminarily solidified and shaped, the viscosity of the sizing agent of the outer surface layer is reduced, so that residues are prevented from being adhered to the extrusion roller when the sizing agent of the outer surface layer is stripped, and the cast film is conveniently separated from the extrusion roller; the positive pressure air knife 28 is arranged at the outlet of the casting channel 23, and air is blown to the edge of the outlet of the casting channel 23 through the positive pressure air knife 28 so as to peel the casting film, further avoid the outer surface layer of the casting film from being adhered to a squeezing roller, and realize quick peeling.
Claims (4)
1. The utility model provides a curtain coating membrane three-layer is crowded device altogether, includes feed mechanism (1) and extrusion mechanism (2), its characterized in that: the feeding mechanism (1) comprises a slurry box (11) and a die head, a first slurry cavity (13), a second slurry cavity (14) and a third slurry cavity (15) are arranged in the slurry box (11), and the die head comprises a first die head (16) used for discharging the first slurry cavity (13), a second die head (17) used for discharging the second slurry cavity (14) and a third die head (18) used for discharging the third slurry cavity (15); the extrusion mechanism (2) comprises an extrusion roller group which comprises a first extrusion roller (21) and a second extrusion roller (22), a casting channel (23) is arranged between the first extrusion roller (21) and the second extrusion roller (22), the first die (16) being arranged above the first press roll (21), the second die (17) being arranged directly above the casting channel (23), the third die head (18) is arranged above the second extrusion roller (22), the first extrusion roller (21) and the second extrusion roller (22) are both provided with cooling hoods (24), a cooling medium cavity (25) is arranged in the cooling cover (24), a cooling cavity (26) is arranged between the cooling cover (24) and the roller body, the cooling medium cavity (25) is provided with a plurality of through holes (27) communicated with the cooling cavity (26), and the outlet of the casting channel (23) is provided with a positive pressure air knife (28).
2. The cast film tri-layer co-extrusion apparatus as recited in claim 1, wherein: the caliber D of the casting channel (23), the caliber D1 of the first die head (16), the caliber D2 of the second die head (17) and the caliber D3 of the third die head (18) satisfy that: d1+ D2+ D3> D.
3. The cast film tri-layer co-extrusion apparatus as recited in claim 1, wherein: the first squeezing roller (21) and the second squeezing roller (22) are both provided with driving rollers.
4. The cast film tri-layer co-extrusion apparatus as recited in claim 3, wherein: the first press roll (21) rotates clockwise and the second press roll (22) rotates counterclockwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921229554.3U CN210501300U (en) | 2019-07-30 | 2019-07-30 | Three-layer co-extrusion device for cast film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921229554.3U CN210501300U (en) | 2019-07-30 | 2019-07-30 | Three-layer co-extrusion device for cast film |
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| Publication Number | Publication Date |
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| CN210501300U true CN210501300U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921229554.3U Active CN210501300U (en) | 2019-07-30 | 2019-07-30 | Three-layer co-extrusion device for cast film |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112720978A (en) * | 2020-12-02 | 2021-04-30 | 界首市天鸿新材料股份有限公司 | PP/PE/PP three-layer co-extrusion diaphragm extrusion device for lithium ion battery |
| CN113443493A (en) * | 2021-08-03 | 2021-09-28 | 秦建军 | Automatic PVC film production static removing device and static removing method thereof |
| CN113635532A (en) * | 2021-08-09 | 2021-11-12 | 界首市天鸿新材料股份有限公司 | PP/PE/PP three-layer co-extrusion lithium battery power diaphragm casting device |
| CN114872293A (en) * | 2022-05-24 | 2022-08-09 | 安徽理工大学 | EVA plastic film extruder |
| CN116214888A (en) * | 2023-05-08 | 2023-06-06 | 合肥长阳新能源科技有限公司 | Adjustable distributor of three-layer co-extrusion casting film |
-
2019
- 2019-07-30 CN CN201921229554.3U patent/CN210501300U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112720978A (en) * | 2020-12-02 | 2021-04-30 | 界首市天鸿新材料股份有限公司 | PP/PE/PP three-layer co-extrusion diaphragm extrusion device for lithium ion battery |
| CN113443493A (en) * | 2021-08-03 | 2021-09-28 | 秦建军 | Automatic PVC film production static removing device and static removing method thereof |
| CN113635532A (en) * | 2021-08-09 | 2021-11-12 | 界首市天鸿新材料股份有限公司 | PP/PE/PP three-layer co-extrusion lithium battery power diaphragm casting device |
| CN114872293A (en) * | 2022-05-24 | 2022-08-09 | 安徽理工大学 | EVA plastic film extruder |
| CN116214888A (en) * | 2023-05-08 | 2023-06-06 | 合肥长阳新能源科技有限公司 | Adjustable distributor of three-layer co-extrusion casting film |
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