CN210999675U - Negative pressure air knife for casting machine and casting machine - Google Patents
Negative pressure air knife for casting machine and casting machine Download PDFInfo
- Publication number
- CN210999675U CN210999675U CN201921706303.XU CN201921706303U CN210999675U CN 210999675 U CN210999675 U CN 210999675U CN 201921706303 U CN201921706303 U CN 201921706303U CN 210999675 U CN210999675 U CN 210999675U
- Authority
- CN
- China
- Prior art keywords
- negative pressure
- pressure air
- chamber
- chambers
- sealing
- 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.)
- Active
Links
Images
Landscapes
- Moulding By Coating Moulds (AREA)
Abstract
The application discloses a negative pressure air knife and casting machine for casting machine. The negative pressure air knife comprises three negative pressure air chambers and a sealing chamber connected with the negative pressure air chambers; the end parts of the three negative pressure air chambers are respectively connected with a main negative pressure air chamber heat exhaust pipe, an auxiliary negative pressure air chamber heat exhaust pipe and a side negative pressure air chamber heat exhaust pipe; the sealing chamber is divided into three sealing chambers by the sealing plate, namely a first sealing chamber, a second sealing chamber and a third sealing chamber which correspond to the three negative pressure air chambers respectively. According to the negative pressure air knife, the edge negative pressure air chamber enables the cast film pasting roller to be more stable, thickness fluctuation is reduced, the thickness of the cast film is more uniform, and later-stage deformation of the diaphragm is improved; the hot air draft improves the broken membrane of curtain coating membrane limit package roller phenomenon. Therefore, the negative pressure air knife of this application can not only improve curtain coating film production quality, can satisfy the user demand of increasing substantially speed production moreover, improves production efficiency.
Description
Technical Field
The application relates to the field of battery diaphragm production equipment, in particular to a negative pressure air knife for a casting machine and the casting machine.
Background
In the production process of the battery diaphragm, the casting machine is equipment for preparing the molten plastic into a casting film, and the casting film is subjected to subsequent steps of stretching and the like to finally prepare the battery diaphragm. The negative pressure air knife is a device which is arranged above the edge of a casting roller of the casting machine and is matched with a die head of the casting machine to make the molten plastic flowing down from the die head attached to the casting roller.
In the current domestic battery diaphragm production, a single-chamber negative pressure air knife is generally adopted, and a part of the single-chamber negative pressure air knife is also used; however, in general, the roller-attaching effect of the negative pressure air knife adopted by the existing casting machine is not ideal, large jitter exists in the attaching process, particularly, high-speed drafting and rapid attaching are required to be performed on molten plastics flowing down from a die head during high-speed production, and the roller-attaching effect is difficult to meet the production requirement; moreover, because the roller pasting effect is not ideal, the thickness of the produced casting film is not uniform, and the later-period shape of the diaphragm is enlarged; in addition, the existing negative pressure air knife scheme has the problems of low production efficiency, high rejection rate, large cost waste and the like due to the edge breakage phenomenon of the die lip.
Disclosure of Invention
The application aims to provide an improved negative pressure air knife for a casting machine and the casting machine.
In order to achieve the purpose, the following technical scheme is adopted in the application:
one aspect of the application discloses a negative pressure air knife for a casting machine, which comprises three negative pressure air chambers and a sealing chamber connected with the three negative pressure air chambers; the three negative pressure air chambers are a main negative pressure air chamber, an auxiliary negative pressure air chamber and a side negative pressure air chamber, the end parts of the three negative pressure air chambers are respectively connected with a main negative pressure air chamber hot exhaust pipe, an auxiliary negative pressure air chamber hot exhaust pipe and a side negative pressure air chamber hot exhaust pipe, and the three exhaust pipes are used for providing hot exhaust air; the sealing chamber is divided into three sealing chambers by a sealing plate, namely a first sealing chamber corresponding to the main negative pressure air chamber, a second sealing chamber corresponding to the auxiliary negative pressure air chamber and a third sealing chamber corresponding to the edge negative pressure air chamber; the three negative pressure air chambers are communicated with the corresponding three sealing chambers through pipelines.
It should be noted that the negative pressure air knife, or three-cavity negative pressure air knife, of the present application is an improvement on the basis of the existing single-cavity negative pressure air knife and two-cavity negative pressure air knife; on one hand, the edge negative pressure air chamber is additionally arranged and used for stabilizing the edge of the cast film and playing a role in fixing the edge, so that the fixing of the edge pressing device is more stable, the stability of the whole pasting roller is improved, the thickness fluctuation is reduced, the thickness control is better, the later deformation of the diaphragm is further reduced, the more stable pasting roller can meet the requirement of production speed improvement, and the production efficiency is improved; on the other hand, current negative pressure air knife generally adopts cold wind negative pressure, and this application changes it into hot exhaust negative pressure, can reduce the difference in temperature of negative pressure wind intracavity convection current wind, and the broken membrane of the broken limit package roller phenomenon when improving high-speed production curtain coating film. It can be understood that, the die head both sides of casting machine are direct and the air contact, all have the forced air cooling phenomenon, and cast film itself also has the necking down, because the broken limit of edge band-pass roll easily takes place during high-speed draft, this application is through the negative pressure wind cavity pipe of reforming into the heating, can compensate both sides die head edge because the temperature loss that the forced air cooling caused to improve the band-pass roll unusually, improve production efficiency.
It should be further noted that, in the negative pressure air knife of the present application, the negative pressure air chamber is connected to the hot air exhaust pipes respectively, and the realization of the hot air exhaust can refer to the existing hot air exhaust device or system. In addition, the negative pressure air knife is arranged above the edge of the casting roller during working and is matched with the die head of the casting machine for use, when the casting machine starts to work, the main negative pressure air chamber and the casting roller are in a semi-sealing state, and the auxiliary negative pressure air chamber and the edge negative pressure air chamber and a melt flowing down from the die head of the casting machine are enclosed into a sealing state; the specific installation mode can refer to the existing single-chamber negative pressure air knife and double-chamber negative pressure air knife, and other components or accessories which are not mentioned in the application can also refer to the existing negative pressure air knife.
Preferably, the three negative pressure air chambers are individually controlled by a control system.
It should be noted that, in the negative pressure air knife of the present application, the three negative pressure air chambers are all controlled by a computer, and compared with the existing double-chamber negative pressure air knife, the present application adds a control program for the edge negative pressure air chambers in the computer control program, so as to realize the independent control of the three negative pressure air chambers. The utility model provides a negative pressure air knife, the amount of wind size and the temperature through adjusting three negative pressure air cavity can control the subsides roller effect that the film lip flows out. In an implementation mode of the application, production test results after equipment transformation show that the cast film pasting roller is good in effect, uniform in thickness control, low in later deformation amount, and capable of meeting the requirement of large-amplitude acceleration production, and the edge breakage phenomenon is obviously improved.
Preferably, the negative pressure of each of the three negative pressure air chambers is controlled to be-10-0 bar.
Preferably, the three negative pressure air chambers are all provided with air pressure meters for monitoring the air pressure of each negative pressure air chamber in real time so as to be convenient for regulation and control.
It should be noted that the barometer is used for controlling the air pressure of each negative pressure air chamber more accurately, and in an implementation manner of the application, the air volume of the three negative pressure air chambers can be automatically controlled and adjusted by a computer through monitoring and feedback of the barometer.
Preferably, the three negative pressure air chambers are respectively provided with an oil discharge hole.
Preferably, the oil discharge holes are respectively arranged at the bottoms of the three negative pressure air chambers.
The oil drain hole is designed to discharge oil smoke and precipitates accumulated in the sealed cavity to prevent the oil smoke and the precipitates from blocking or polluting the casting roller; it will be appreciated that this structural design may be adopted as required.
The application discloses another side discloses a casting machine that adopts the negative pressure air knife of this application.
The casting machine has the advantages that by improving the negative pressure air knife, the roll attaching effect of the casting film is better, the thickness is controlled more uniformly, the deformation amount at the later stage is small, and the edge breakage phenomenon is reduced; adopt this application to improve the casting machine of negative pressure air knife, can improve production speed and quality, satisfy the user demand of increasing speed production by a wide margin.
Due to the adoption of the technical scheme, the beneficial effects of the application are as follows:
according to the negative pressure air knife, the edge negative pressure air chamber is added, so that the cast film pasting roller is more stable, the thickness fluctuation is reduced, the thickness of the cast film is more uniform, and the later deformation of the diaphragm is improved; the phenomenon of film breaking, edge breaking and roll wrapping of the cast film is improved through improvement of hot air suction negative pressure. Consequently, the negative pressure air knife of this application not only can improve curtain coating membrane production quality, can satisfy the user demand of the production of increasing substantially moreover speed, and then improves the production efficiency of curtain coating membrane.
Drawings
FIG. 1 is a left side view of a three-chamber negative pressure system in an embodiment of the present application;
FIG. 2 is a cross-sectional view of a three-chamber negative pressure system in an embodiment of the present application;
FIG. 3 is a top view of a three-chamber negative pressure system in an embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to specific embodiments and the attached drawings. The following examples are intended to be illustrative of the present application only and should not be construed as limiting the present application.
Examples
The negative pressure air knife for the casting machine comprises three negative pressure air chambers and a sealing chamber connected with the three negative pressure air chambers as shown in figures 1 to 3; the three negative pressure air chambers are a main negative pressure air chamber 11, an auxiliary negative pressure air chamber 12 and an edge negative pressure air chamber 13, the end parts of the three negative pressure air chambers are respectively connected with a main negative pressure air chamber heat exhaust pipe 21, an auxiliary negative pressure air chamber heat exhaust pipe 22 and an edge negative pressure air chamber heat exhaust pipe 23, and the three exhaust pipes are used for providing hot exhaust; the sealing chamber is divided into three sealing chambers by a sealing plate, namely a first sealing chamber 31 corresponding to the main negative pressure air chamber, a second sealing chamber 32 corresponding to the auxiliary negative pressure air chamber, and a third sealing chamber 33 corresponding to the edge negative pressure air chamber, the third sealing chamber is composed of a left chamber 331 and a right chamber 332, and the left chamber 331 and the right chamber 332 are communicated with the edge negative pressure air chamber together, as shown in fig. 3; the three negative pressure air chambers are communicated with the three sealed chamber pipelines. In one mode of this embodiment, the three negative pressure air chambers are respectively provided with independently controlled negative pressure air blowers, that is, the main negative pressure air blower 41 is communicated with the main negative pressure air chamber 11 through the main negative pressure air chamber heat exhaust duct 21, the auxiliary negative pressure air blower 42 is communicated with the auxiliary negative pressure air chamber 12 through the auxiliary negative pressure air chamber heat exhaust duct 22, and the edge negative pressure air blower 43 is communicated with the edge negative pressure air chamber 13 through the edge negative pressure air chamber heat exhaust duct 23.
In the embodiment, a computer control program is adopted to independently control the three negative pressure air chambers, and the negative pressure of each negative pressure air chamber is controlled to be-10-0 bar; specifically, the negative pressure of each negative pressure air chamber can be adjusted according to production requirements. In a further improved scheme, in order to facilitate real-time monitoring of the negative pressure of each negative pressure air chamber, in the present example, barometers are installed in all three negative pressure air chambers so as to facilitate automatic regulation and control by a computer, specifically, a first negative pressure meter 51 is installed on the main negative pressure air chamber 11, a second negative pressure meter 52 is installed on the auxiliary negative pressure air chamber 12, and a third negative pressure meter 53 is installed on the edge negative pressure air chamber 13. In addition, in order to facilitate the discharge of the soot and the precipitates accumulated in the sealed chamber, the present example is provided with drain holes at the bottom of the three negative pressure air chambers to prevent the soot and the precipitates from clogging or contaminating the casting roll.
The negative pressure air knife of this example is installed above the edge of the casting roller when working, as shown in fig. 1, and is used with the casting machine die head 01, when the working starts, the first sealing cavity 31 corresponding to the main negative pressure air cavity and the casting roller 02 are in a semi-sealing state, and the second sealing cavity and the third sealing cavity corresponding to the auxiliary negative pressure air cavity and the edge negative pressure air cavity and the melt flowing down from the casting machine die head are enclosed into a sealing state. The three-cavity negative pressure respectively controls the upper edge part, the lower edge part and the two side edge parts of the casting roller to be vacuumized, the air pressure meter arranged on each negative pressure air chamber is communicated with a computer, and the air volume and the temperature are controlled through a computer program, so that the air pressure and the temperature of the three negative pressure air chambers are regulated and controlled.
The negative pressure air knife of the embodiment realizes the independent control of the three negative pressure air chambers through a computer control program, and is connected with the heating exhaust air pipe instead. The negative pressure air chamber at the edge part can play a role in fixing the edge, so that the edge fixing of the edge pressing device is more stable, the negative pressure of the three chambers is adjusted to be-10-0 bar, a high-speed drawn cast film can be stably attached to the roller, the stability of the integral attaching roller is improved by improving the effect of the edge cast film attaching roller, the attaching jitter is reduced, the uniform control on the thickness is realized, the crystallization of the film on the chill roll is more perfect, the arrangement of the lamella crystals is more regular, and the later deformation of the diaphragm is reduced; and the more stable roller that pastes can satisfy production speeding, improves production efficiency. The original cold air pipe is changed into the heating air pipe, so that the temperature difference of convection air in the negative pressure air cavity can be reduced, and the phenomenon of film breaking, edge breaking and roll wrapping during high-speed production of cast films is improved; the direct and air contact of die head both sides of casting machine all has the forced air cooling phenomenon, and the curtain coating membrane of own also has the necking down, because the broken limit package roller easily takes place for marginal cold glue during high-speed draft, through reforming into the negative pressure wind cavity pipe of heating, can compensate both sides die head edge because the temperature loss that the forced air cooling caused, improve package roller unusual, improve production efficiency.
The negative pressure air knife of the embodiment controls the roller pasting effect of the film lip opening by adjusting the air volume and the temperature of the three-cavity negative pressure air knife, and the production test is carried out after the equipment is transformed. Specifically, taking the production of a polypropylene microporous membrane product with a thickness of 11 μm as an example, the casting speed of the three-cavity negative pressure air knife, the standard deviation mean of the thickness, the proportion of deformation such as wave or vertical edge and the like generated in the later period of the product, the number of edge breakage times generated every month, and the production yield of the product are adopted in the test.
Meanwhile, the same test was conducted using a conventional double chamber negative pressure air knife in this example as a comparison. The test results are shown in table 1.
TABLE 1 test results of three-chamber negative pressure air knife and two-chamber negative pressure air knife
In table 1, the "double-cavity structure" corresponding to the "negative pressure system" is the double-cavity negative pressure air knife, and the "three-cavity structure" is the three-cavity negative pressure air knife in this example. The results in table 1 show that the flow-casting limiting speed of the three-cavity negative pressure air knife is significantly higher than that of the two-cavity negative pressure air knife in the present example, which indicates that the three-cavity negative pressure air knife can meet the requirement of production speed increase; in the aspect of thickness control, the standard deviation mean value of the double-cavity negative pressure air knife is 0.025, but the standard deviation mean value is only 0.01 in the application, which shows that the thickness of the diaphragm is controlled more uniformly by adopting the three-cavity negative pressure air knife; in addition, the three-cavity negative pressure air knife is adopted, the proportion of the later deformation is reduced to 2-3%, and compared with 7-8% of the double-cavity negative pressure air knife, the effect of reducing the later deformation is obviously improved; in the long-term use process, the counted broken edge times of each month show that the broken edge of the three-cavity negative pressure air knife is only 2-3 times per month, and the broken edge of the two-cavity negative pressure air knife is up to 10-15 times per month; furthermore, the statistical result of the production product yield shows that the highest product yield of the three-cavity negative pressure air knife can reach 97%, while the highest product yield of the two-cavity negative pressure air knife is only 88%. The results of comparative analysis table 1 show that the three-cavity negative pressure air knife of the embodiment is obviously superior to the existing two-cavity negative pressure air knife in the aspects of speed-up production, thickness control, later deformation control, edge breakage control and the like; and moreover, the three-cavity negative pressure air knife is adopted, so that the product yield is greatly improved, and the production efficiency and the quality are improved.
The foregoing is a more detailed description of the present application in connection with specific embodiments thereof, and it is not intended that the present application be limited to the specific embodiments thereof. It will be apparent to those skilled in the art from this disclosure that many more simple derivations or substitutions can be made without departing from the spirit of the disclosure.
Claims (7)
1. The utility model provides a negative pressure air knife for casting machine which characterized in that: comprises three negative pressure air chambers and a sealing chamber connected with the negative pressure air chambers;
the three negative pressure air chambers are a main negative pressure air chamber, an auxiliary negative pressure air chamber and a side negative pressure air chamber, the end parts of the three negative pressure air chambers are respectively connected with a main negative pressure air chamber hot exhaust pipe, an auxiliary negative pressure air chamber hot exhaust pipe and a side negative pressure air chamber hot exhaust pipe, and the three exhaust pipes are used for providing hot exhaust air;
the sealing chamber is divided into three sealing chambers by a sealing plate, namely a first sealing chamber corresponding to the main negative pressure air chamber, a second sealing chamber corresponding to the auxiliary negative pressure air chamber and a third sealing chamber corresponding to the edge negative pressure air chamber.
2. The negative pressure air knife of claim 1, wherein: the three negative pressure air chambers are respectively and independently controlled by a control system.
3. The negative pressure air knife of claim 2, wherein: the three negative pressure air chambers respectively control the negative pressure to be-10-0 bar.
4. The negative pressure air knife of any one of claims 1-3, wherein: and the three negative pressure air chambers are all provided with barometers for monitoring the air pressure of each negative pressure air chamber in real time so as to be convenient for regulation and control.
5. The negative pressure air knife of any one of claims 1-3, wherein: oil discharge holes are respectively formed in the three negative pressure air chambers.
6. The negative pressure air knife of claim 5, wherein: the oil discharge holes are respectively arranged at the bottoms of the three negative pressure air chambers.
7. A casting machine using the negative pressure air knife of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921706303.XU CN210999675U (en) | 2019-10-12 | 2019-10-12 | Negative pressure air knife for casting machine and casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921706303.XU CN210999675U (en) | 2019-10-12 | 2019-10-12 | Negative pressure air knife for casting machine and casting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210999675U true CN210999675U (en) | 2020-07-14 |
Family
ID=71499549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921706303.XU Active CN210999675U (en) | 2019-10-12 | 2019-10-12 | Negative pressure air knife for casting machine and casting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210999675U (en) |
-
2019
- 2019-10-12 CN CN201921706303.XU patent/CN210999675U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210999675U (en) | Negative pressure air knife for casting machine and casting machine | |
| CN110202726A (en) | Battery diaphragm baking oven device | |
| CN109657263A (en) | A kind of overflow brick entrance groove width, slot be high and the design method of cell wall thickness | |
| CN204019832U (en) | A kind of malleation air blade device being applicable to lithium battery curtain coating basement membrane and producing | |
| CN204939657U (en) | A kind of ingot furnace airflow guiding device | |
| WO2020063060A1 (en) | Air suction device for casting apparatus | |
| CN205062228U (en) | Vertical pulling single crystal draft tube | |
| CN209702549U (en) | A kind of stagnation coldplate interruption cooling device in vial manufacture | |
| CN209024401U (en) | Carboy pressuring-blowing process mould | |
| CN210817349U (en) | Piping lane buttress mould structure | |
| CN206751909U (en) | One kind plating film heating device | |
| CN208094584U (en) | A kind of router based on internet-based control | |
| CN209207848U (en) | Casting apparatus air intake device | |
| CN213570115U (en) | Humidifying device for substrate glass production | |
| CN220245899U (en) | Cooling system for large discharge amount material channel | |
| CN201447416U (en) | Smelting-succession furnace for one-time molding quartz plate | |
| CN205028985U (en) | Liquid cooling's ternary group battery | |
| CN204570089U (en) | A kind of crystalline silicon growing apparatus | |
| CN110311080A (en) | A kind of lithium battery single-layer septum production line | |
| CN211823665U (en) | Multistage utilization type film drying device | |
| CN211891949U (en) | High-efficient high yield inflation film manufacturing machine cooling wind ring | |
| CN216152844U (en) | Heat sink is used in film production | |
| CN210862248U (en) | Novel cooling device is used in processing of platelike corundum | |
| CN213321698U (en) | High-efficiency double-tuyere wind ring | |
| CN220973238U (en) | Be used for new energy automobile charging seat production auxiliary device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |