CN207578865U - Low noise casting machine air knife - Google Patents
Low noise casting machine air knife Download PDFInfo
- Publication number
- CN207578865U CN207578865U CN201721713020.9U CN201721713020U CN207578865U CN 207578865 U CN207578865 U CN 207578865U CN 201721713020 U CN201721713020 U CN 201721713020U CN 207578865 U CN207578865 U CN 207578865U
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- cutter hub
- air
- precompressed
- pad pasting
- flow
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Abstract
Low noise casting machine air knife, including the precompressed cutter hub being fixed in side by side on knife rest and pad pasting cutter hub, precompressed cutter hub and pad pasting cutter hub are connected respectively by carrying the pipeline of air-flow speed governing valve with wind turbine.The utility model is by adding the precompressed cutter hub with straight air duct and wide air port in pad pasting cutter hub front end, precompressed is carried out to casting films using relatively low flow rate gas flow, to reduce the air-flow velocity needed for pad pasting cutter hub, the jet for weakening the reverse impact formation of air-flow at pad pasting cutter hub spray seam is uttered long and high-pitched sounds.Meanwhile precompressed cutter hub air-flow is under the blocking of baffle, forms the air-flow moved downward along curtain coating membrane body, so as to disturb the reverse impact air-flow at pad pasting cutter hub, avoids forming continuous spray in necking air duct, is conducive to further to weaken jet and utter long and high-pitched sounds.
Description
Technical field
The utility model is related to BOPP production technical fields more particularly to a kind of low noise casting machine air knives.
Background technology
The casting films that casting machine die head squeezes out must through the blowing of air knife, conform on chill roll and be cooled and shaped.To carry
High gas flow blows efficiency, and for existing casting machine air knife using necking air duct and spray seam outlet, the air velocity for making ejection is high.Add
Casting machine air knife and chill roll between distance it is minimum, stronger reverse impact wave is formed after the gas shock chill roll of ejection,
It backwashes and forms continuous spray in air duct, so as to which the jet for forming larger is uttered long and high-pitched sounds, make production environment in workshop more severe.
Utility model content
The utility model provides a kind of low noise casting machine air knife, insufficient to solve the above-mentioned prior art.By in pad pasting
The precompressed cutter hub with straight air duct and wide air port is added in cutter hub front end, and precompressed is carried out to casting films using relatively low flow rate gas flow, with
Just the air-flow velocity needed for pad pasting cutter hub is reduced, the jet for weakening the reverse impact formation of air-flow at pad pasting cutter hub spray seam is uttered long and high-pitched sounds.
Meanwhile precompressed cutter hub air-flow forms the air-flow moved downward along curtain coating membrane body, so as to disturb pad pasting cutter hub under the blocking of baffle
The reverse impact air-flow at place avoids forming continuous spray in necking air duct, is conducive to further to weaken jet and utter long and high-pitched sounds.
In order to realize the purpose of this utility model, intend using following technology：
Low noise casting machine air knife, which is characterized in that including the precompressed cutter hub being fixed in side by side on knife rest and pad pasting cutter hub,
The precompressed cutter hub and the pad pasting cutter hub are connected respectively by carrying the pipeline of air-flow speed governing valve with wind turbine；The precompressed cutter hub
Interior to be equipped with straight air duct, the straight air duct forms air outlet in the precompressed cutter hub bottom, necking wind is equipped in the pad pasting cutter hub
Road, the necking air duct form spray seam in the pad pasting cutter hub bottom, and the height of the air outlet is higher than the height for spraying seam.
Further, the knife rest is fixed with baffle close to one end of the precompressed cutter hub by carrying being hinged for positioning pin.
The beneficial effects of the utility model are：
1st, the utility model is by adding the precompressed cutter hub with straight air duct and wide air port in pad pasting cutter hub front end, using compared with
Low flow velocity airflow convection prolongs film and carries out precompressed, to reduce the air-flow velocity needed for pad pasting cutter hub, weakens at pad pasting cutter hub spray seam
The jet that the reverse impact of air-flow is formed is uttered long and high-pitched sounds.
2nd, the utility model blocks precompressed cutter hub air-flow by baffle, to form what is moved downward along curtain coating membrane body
Air-flow so as to disturb the reverse impact air-flow at pad pasting cutter hub, avoids forming continuous spray in necking air duct, be conducive into
One step weakens jet and utters long and high-pitched sounds.
Description of the drawings
Fig. 1 shows the utility model structure diagram.
Fig. 2 shows the utility model air flow direction schematic diagrames in embodiment.
Specific embodiment
As shown in Figure 1, low noise casting machine air knife, including the precompressed cutter hub 1 being fixed in side by side on knife rest 3 and pad pasting cutter hub
2.The knife rest 3 is suspended at casting machine chill roll front end by regulation stent, for adjusting and fixing the precompressed cutter hub 1 and institute
The fixed position of pad pasting cutter hub 2 is stated, the precompressed cutter hub 1 and the pad pasting cutter hub 2 is made to blow casting films and conform to chill roll
To carry out cooling and shaping at surface.
The precompressed cutter hub 1 and the pad pasting cutter hub 2 are connected respectively by carrying the pipeline of air-flow speed governing valve with wind turbine 4.
Straight air duct 11 is equipped in the precompressed cutter hub 1, the straight air duct 11 forms air outlet 12 in 1 bottom of precompressed cutter hub, described
Necking air duct 21 is equipped in pad pasting cutter hub, the necking air duct 21 forms spray seam 22 in the pad pasting cutter hub bottom.The wind turbine 4
The air-flow of extraction enters the straight air duct 11 and the necking air duct 21 by the air-flow speed governing valve on pipeline respectively, make it is described go out
The airflow convection generated at air port 12 and the spray seam 22 prolongs film and sets ability with different pressures.The pad pasting cutter hub 2 with it is existing
Air knife structure is similar, thoroughly presses to set by casting films using larger air velocity and fits on chill roll.And it adds described pre-
Push type broach body 1 then carries out precompressed using smaller air velocity to casting films, advantageously reduces the air-flow needed for the pad pasting cutter hub 2
Flow velocity, so as to which the jet that the reverse impact for reducing air-flow at the spray seam 22 is formed is uttered long and high-pitched sounds.
The height of the air outlet 12 stitches 22 height higher than the spray, to expand the 12 gas-flow radiation face of air outlet
Product.
The knife rest 3 is fixed with baffle 5 close to one end of the precompressed cutter hub 1 by carrying being hinged for positioning pin.It is described
1 air-flow of precompressed cutter hub forms the air-flow moved downward along curtain coating membrane body, so as to disturb the patch under the blocking of the baffle 5
Reverse impact air-flow at hymenotome body 2 avoids forming continuous spray in the necking air duct 21, is conducive to further weaken
Jet is uttered long and high-pitched sounds.
Illustrate that specific embodiment of the present invention is as follows in conjunction with the embodiments：
As shown in Fig. 2, adjusting the position of the knife rest 3, make the air outlet 12 and the spray seam 22 perpendicular to chill roll
7.The positioning pin at the baffle 5 is unscrewed, the baffle 5 is adjusted and is horizontal.According to casting films at casting machine co-extrusion die head 8
9 position further adjusts the position of the knife rest 3, makes the spray seam 22 close to the casting films 9.
The air-flow speed governing that the precompressed cutter hub 1 and the pad pasting cutter hub 2 are connected with the wind turbine 4 at pipeline is adjusted respectively
Valve makes the air-flow from the air outlet 12 and 22 outflow of spray seam meet pad pasting requirement, excessive will not both lead to the curtain coating
Film 9 ruptures, will not be too small and the casting films 9 can not be made to be fitted at the chill roll 7.
Gas flow rate is relatively low in straight air duct 11 in the precompressed cutter hub 1.Air-flow is comforted oneself the air outlet 12 of mouth structure
It after outflow, blows to the casting films 9, pushes membrane body to reduce the spacing of the casting films 9 and the chill roll 7.It is described
21 air velocity of necking air duct in pad pasting cutter hub 2 gradually increases, until the spray seam 22 sprays, is depressed sufficiently the casting films 9
It conforms on the chill roll 7.
Air-flow at the air outlet 12 flows after the casting films 9 are pushed along film surface.The air-flow quilt flowed up
It after the baffle 5 blocks, turns to, in addition to dissipating to both sides, is also formed with air-flow that one flows downward along the casting films 9 extremely
At the spray seam 22, the impact air-flow formed after casting films 9 described in gas shock at this is disturbed, is avoided in the necking air duct 21
It is interior to form continuous spray, it utters long and high-pitched sounds so as to weaken the jet generated at the spray seam 22.
Claims (2)
1. low noise casting machine air knife, which is characterized in that including being fixed in knife rest side by side（3）On precompressed cutter hub（1）And pad pasting
Cutter hub（2）, the precompressed cutter hub（1）With the pad pasting cutter hub（2）Respectively by carrying the pipeline and wind turbine of air-flow speed governing valve（4）
It is connected；The precompressed cutter hub（1）It is interior to be equipped with straight air duct（11）, the straight air duct（11）In the precompressed cutter hub（1）Bottom is formed
Air outlet（12）, the pad pasting cutter hub is interior to be equipped with necking air duct（21）, the necking air duct（21）In the pad pasting cutter hub bottom
Form spray seam（22）, the air outlet（12）Height higher than it is described spray stitch（22）Height.
2. air knife according to claim 1, which is characterized in that the knife rest（3）Close to the precompressed cutter hub（1）One end
Baffle is fixed with by carrying being hinged for positioning pin（5）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721713020.9U CN207578865U (en) | 2017-12-11 | 2017-12-11 | Low noise casting machine air knife |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721713020.9U CN207578865U (en) | 2017-12-11 | 2017-12-11 | Low noise casting machine air knife |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207578865U true CN207578865U (en) | 2018-07-06 |
Family
ID=62736623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721713020.9U Active CN207578865U (en) | 2017-12-11 | 2017-12-11 | Low noise casting machine air knife |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207578865U (en) |
-
2017
- 2017-12-11 CN CN201721713020.9U patent/CN207578865U/en active Active
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