CN209971458U - Sheet casting device and air knife of plastic film production line - Google Patents
Sheet casting device and air knife of plastic film production line Download PDFInfo
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- CN209971458U CN209971458U CN201920276273.7U CN201920276273U CN209971458U CN 209971458 U CN209971458 U CN 209971458U CN 201920276273 U CN201920276273 U CN 201920276273U CN 209971458 U CN209971458 U CN 209971458U
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Abstract
The utility model provides a casting device and an air knife for a plastic film production line, relating to the field of plastic film production; the air knife comprises an air knife body, a fixed knife lip and a movable knife lip which are connected with the air knife body to form an air tap, a sealing plate used for sealing two ends of the air knife body in the length direction, and an air tap width adjusting mechanism used for realizing air tap width adjustment; the air tap width adjusting mechanism is matched with an inner wind blocking block and a guide plate which are arranged in the air knife body through a sliding sleeve screw mechanism arranged on the outer side of the air knife body, and gradually blocks air flow from passing through the air tap when the screw slides, so that the air tap width is timely adjusted; in addition, an edge limiter for reinforcing the sealing of the partition part is arranged between the inner wind shielding block and the air nozzle partition part, and the edge limiter further adjusts the width position of the air nozzle; the utility model discloses simple structure, convenient to use all can carry out the attachedly to the thick piece of multiple width, improves the practicality of casting piece device and air knife.
Description
Technical Field
The utility model relates to a plastic film production field, concretely relates to cast piece device and air knife of plastic film production line.
Background
After being formed by a die head, the plastic melt is urgently required to be attached to a chill roll of a sheet casting machine for cooling and shaping, so that a thick sheet with uniform thickness and stable performance is obtained, and the process is also called as a sheet casting. The air knife is an attaching device arranged at the moment of casting a sheet, plays a vital role in ensuring the thickness uniformity and performance stability of the thick sheet after the sheet is cast, and the edges of two sides of the thick sheet can be subjected to certain necking deformation when the thick sheet is formed through a die head, so that special requirements are provided for the attaching performance of two sides of the air knife.
In the prior art, for example, an extruder air knife device disclosed in CN207465692U patent proposes an adjusting range with an increased air knife angle, which includes a first air knife body, the first air knife body has a gap with a chill roll, the device further includes an air knife holder, and a first guide rail and a second guide rail that are arranged on the air knife holder, the second guide rail is rotatably arranged on the air knife holder, the first air knife body is slidably arranged on the first guide rail and the second guide rail and can swing along an axis of the second guide rail, the first guide rail is provided with an angle adjusting assembly for adjusting the rotation of the first air knife body and a locking member for limiting the sliding of the first air knife body; this application can be adapted to slabs of different sizes.
Still like the hybrid accessory piece device of air knife static that CN201900721U patent discloses, including air knife accessory piece subassembly, static serging subassembly, air knife accessory piece subassembly include air knife, air knife fixed bolster, static serging subassembly include static needle, static needle regulating unit, air knife one end fix at air knife fixed bolster, static needle be equipped with two, these two static needles are established on the both sides of the other end of air knife, static needle regulating unit be connected with the static needle for keep the substrate stable not taking place the shake in process of production.
However, the air knife structure disclosed in the prior art has a simple structure, and cannot realize precise fine adjustment of the width of the air nozzle, air volume compensation, width adjustment of the air nozzle and other problems, so that the air flow is not uniform in the transverse direction, the width adaptability is poor, and effective attachment of the edges of the two sides of the thick sheet cannot be guaranteed, so that the performance and yield of the thick sheet are affected, and adverse effects are generated on subsequent processing of a plastic film.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cast piece device and air knife of plastic film production line realizes the air cock width of air knife and adjusts and air compensation among the cast piece device on the one hand, and on the other hand adopts the blowing edge structure to strengthen the attached of thick piece both sides edge in the plastic film production line cast piece.
To achieve the above objective, the present invention provides the following technical solutions: an air knife for attaching thick sheets to a sheet casting device of a plastic film production line comprises an air knife body, a fixed knife lip, a movable knife lip, a sealing plate and an air nozzle width adjusting mechanism.
The air knife body is of a cavity structure with an opening and comprises a semi-cylinder, a first straight plate and a second straight plate, wherein the first straight plate and the second straight plate are arranged on the side edges of the two sides of the semi-cylinder in the length direction in a matching mode; wear to be equipped with the inner tube in the air knife body cavity, the inner tube is provided with the wide seam of air-out along its length and corresponding open-ended opposite direction, and the wide seam of air-out is used for along the reverse flow direction air cock of the half-cylinder arc inner wall of cavity after the air current passes through the wide seam of air-out through the inner tube, increases the air current stroke, plays steady voltage and static pressure's effect to air current in the cavity structure, has guaranteed the homogeneity of air current in the cavity.
The fixed knife lip is connected to the end part of the first straight plate far away from the semi-cylinder, and the movable knife lip is connected to the end part of the second straight plate far away from the semi-cylinder; an air nozzle is formed among the fixed cutter lip, the movable cutter lip and the opening, the end part of the fixed cutter lip, which is far away from the air cutter body, is in clearance fit with the end part of the movable cutter lip, which is far away from the air cutter body, so that an air nozzle opening is formed, and the air nozzle opening faces the thick sheet attaching direction; the inner side surface of the fixed cutter lip, which is contacted with the airflow, is a smooth transition curved surface which is bent towards the side far away from the movable cutter lip, and the inner side surface of the movable cutter lip, which is contacted with the airflow, is a smooth transition curved surface which is bent towards the fixed cutter lip; the air nozzle with the curved surface structure is beneficial to being matched with the air cutter body to guide the air flow, and the air flow is blown to the thick plate produced by the casting device through the opening of the air nozzle to play a thrust role in attaching the thick plate to the chill roll.
The sealing plates are arranged on two sides of the air knife body in the length direction and extend to the air tap opening, and the sealing plates are used for forming an airflow cavity containing the air tap opening; and the face that the closing plate corresponds with the inner tube is provided with the second mounting hole, and the inner tube is worn out the second mounting hole and is connected in proper order in admission line and air supply unit, supplies air to the air current cavity.
The air tap width adjusting mechanisms are symmetrically arranged on two sides of the air knife body in the length direction and comprise sliding sleeves, screw rods, inner wind blocking blocks and guide plates; the surface of the sealing plate corresponding to the air tap is provided with a first mounting hole, the end part of the sliding sleeve is connected with the first mounting hole, and the inside of the sliding sleeve is communicated with the air tap; the screw rod is inserted into the sliding sleeve from one end of the sliding sleeve, which is far away from the sealing plate, and extends to the air tap; the screw is matched with the sliding sleeve and has freedom degree of axial sliding adjustment in the sliding sleeve; the inner wind block is matched with the air tap, is arranged in the air tap and is connected with the screw rod; the guide plate and the sliding sleeve are arranged at the sealing plate at the same side, one end of the guide plate penetrates through the sealing plate to be connected to the side face, close to the air knife body, of the inner wind blocking block, and the guide plate is matched with the sealing plate; the screw rod slides along the sliding sleeve axial direction, and the guide plate that drives interior wind deflector and be connected with interior wind deflector simultaneously moves along the sliding sleeve axial direction.
Defining the length direction of the semi-cylinder as the length direction of an air knife, wherein the sliding sleeve is arranged in parallel with the length direction of the air knife, the length of the air knife is marked as L1, and the length of the guide plate is marked as L2, so that L2 is not less than 1/2L 1; the guide plate gradually moves from the mounting side sealing plate to the opposite side, and the inner wind blocking block is matched to partially block air flow from passing through the air nozzle, so that the effect of adjusting the width of the air nozzle is achieved, and the applicability of the air knife in the plastic film production line by adopting air knife attachment is improved.
Further, the direction perpendicular to the length direction of the air knife, where the connecting line of the side face of the inner wind shielding block close to the fixed knife lip and the side face close to the movable knife lip is located, is defined as the height direction of the inner wind shielding block; the inner wind blocking block comprises a fixed block, a compression spring, an upper floating block and a lower floating block; the fixed block is connected with the screw rod, a through hole is formed in the fixed block in the height direction of the inner wind blocking block, and grooves are formed in the positions, corresponding to the through hole, of the upper side and the lower side of the fixed block; the compression spring is arranged in the through hole and is always in a compression state; the upper floating block is connected to the end part of the compression spring close to the movable knife lip, the upper floating block is freely clamped in the groove on the upper side of the fixed block, the lower floating block is connected to the end part of the compression spring close to the fixed knife lip, and the lower floating block is freely clamped in the groove on the lower side of the fixed block; the side surface of the upper floating block close to the movable knife lip is matched with the inner side surface of the movable knife lip, and the side surface of the lower floating block close to the fixed knife lip is matched with the inner side surface of the fixed knife lip; because the compression spring is always in a compression state, the upper floating block and the lower floating block are always attached to the inner side surfaces of the movable cutter lip and the fixed cutter lip, the opening adjustment of the opening of the air nozzle can be matched, and the effective air flow partition of the air nozzle part can be realized.
Furthermore, the screw rod is of a hollow structure, a pull rod is inserted into the end part of one side, away from the sliding sleeve, of the screw rod, and the pull rod penetrates through the screw rod and extends into the air faucet; the pull rod is matched with the screw rod and has the freedom degree of axial sliding adjustment in the screw rod; the end part of the pull rod positioned at the air tap is connected with an edge limiter; the edge limiter is sleeved on the part of the screw rod, which is positioned at the air tap, and has the freedom degree of sliding on the part of the screw rod, which is positioned at the air tap; the edge limiter comprises a flow limiting plate, the thickness of the flow limiting plate is matched with the air faucet opening, and part of the flow limiting plate penetrates through the air faucet opening, so that the air faucet opening of the partition part is sealed, and the partition effect of the width of the air faucet of the partition part of the inner wind blocking block and the guide plate is enhanced.
Further, the air knife also comprises an edge blowing device; the edge blowing device comprises a pipe body and a guide plate, the pipe body is fixedly connected to the guide plate, one end of the pipe body is connected with the air supply unit through an air pipe, the other end of the pipe body penetrates through the sealing plate to be arranged into a flat structure, the flat structure extends into the air nozzle along the guide plate, and the flat structure is attached to the side face, away from the edge limiting device, of the inner wind blocking block; the guide plate is arranged at the end part of the pipe body, which is positioned in the air faucet, and is positioned at the outer edge of the pipe orifice of the end part, which is far away from the inner wind blocking block; the guide plate is used for guiding the air flow passing through the pipe body to the edges of the two sides of the thick sheet, and the edge blowing device provides slightly stronger air flow than air nozzle air flow, so that the acting force on the edges of the two sides of the thick sheet is increased, and the attaching effect is enhanced.
Furthermore, the movable knife lip comprises a movable knife lip opening for forming an air nozzle opening, a movable knife lip body fixedly connected with the second straight plate and a movable knife lip adjusting mechanism; the movable knife lip adjusting mechanism comprises a coarse adjusting mechanism and a fine adjusting mechanism, the coarse adjusting mechanism is arranged on the second straight plate and comprises a coarse adjusting bolt, and the end part of the coarse adjusting bolt is abutted against the movable knife lip; the fine adjustment mechanism is arranged on the movable knife lip body and comprises a groove and a fine adjustment bolt which are arranged on the movable knife lip; the groove is arranged between the moving knife lip mouth and the moving knife lip body, and the end part of the screw rod of the fine adjustment bolt penetrates through the groove and abuts against the moving knife lip mouth; the moving blade lip adjusting mechanism is used for adjusting the micro opening and the micro closing of the moving blade lip mouth, and the precise fine adjustment of the opening width of the air nozzle is realized.
Furthermore, a plurality of air flow compensation interfaces are arranged at the positions, corresponding to the air outlet wide slits, of the semicircular cylinder, and the air flow compensation interfaces are sequentially connected with the air supply speed regulating valve and the air supply unit through air pipes and used for carrying out air flow compensation at different positions according to air flow changes in the air flow cavity, so that consistency of air knife attached air flow is guaranteed.
Furthermore, the utility model provides a plastic film production line's cast piece device, including chill roll, erection support and foretell air knife structure in the device, the air knife is used for cooling the design attached to the chill roll under the effect of air knife air current thrust with the thick piece of cast piece device production.
According to the technical scheme provided by the utility model, the utility model discloses a cast piece device and air knife of plastic film production line has obtained following beneficial effect:
the utility model discloses an air knife for thick sheet attachment in a sheet casting device of a plastic film production line, which comprises an air knife body, a fixed knife lip and a movable knife lip which are connected with the air knife body to form an air nozzle, a sealing plate for sealing two ends of the air knife body in the length direction and an air nozzle width adjusting mechanism for realizing air nozzle width adjustment; the air tap width adjusting mechanism is matched with an inner wind blocking block and a guide plate which are arranged in the air knife body through a sliding sleeve screw mechanism arranged on the outer side of the air knife body, and gradually blocks air flow from passing through the air tap when the screw slides, so that the air tap width is timely adjusted; in addition, an edge limiter for reinforcing the airflow closure of the partition part is also arranged between the inner wind shielding block and the air nozzle partition part, and the edge limiter further adjusts the width position of the air nozzle; through the regulation to the air cock width, can correspond the thick piece of the multiple width of casting the production of piece device and carry out attached, improve the attached practicality of air knife.
The movable knife lip adjusting mechanism is also arranged on the movable knife lip, and the precise fine adjustment of the opening width of the air tap is realized by adjusting the micro opening and the micro closing of the lip mouth of the movable knife lip; and, can stabilize attached to the chill roll in order to guarantee the thick piece both sides edge of casting the production of piece device, the utility model discloses an edge blowing device structure, the air-out of edge blowing device is laminated including the direct water conservancy diversion of guide plate on the wind-blocking piece to the thick piece edge, guarantees the attached quality at thick piece both sides edge, improves the performance and the yield on casting piece process thick piece both sides edge. Furthermore, the utility model discloses still further adopt to set up tolerance compensation interface on the air knife body, realize the tolerance compensation of air current cavity, carry out the tolerance compensation of different positions according to the change of the interior air current of air current cavity, guarantee the uniformity of attached air current.
The utility model discloses a cast piece device for on plastic film production line, blow including chill roll, erection support and air knife and attach, simple structure, manufacturing cost is lower, produces not unidimensional thick piece and can both effectively attached to the chill roll, and the range of application is wide, is favorable to using widely in the film production field.
It should be understood that all combinations of the aforementioned concepts and additional concepts described in greater detail below can be considered part of the inventive subject matter of the present disclosure unless such concepts contradict each other.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of the specific embodiments in accordance with the teachings of the present invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a front view of an air knife of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a partial block diagram of section B-B in FIG. 2;
FIG. 4 is a view of the inner wind deflector;
FIG. 5 is a view showing the construction of the edge limiter.
Wherein, the specific meaning of each mark is as follows:
1 thick sheet, 2 air knife body, 2-1 semi-circle cylinder, 2-2 first straight plate, 2-3 second straight plate, 2-4 inner pipe, 2-5 air outlet wide slot, 2-6 air volume compensation interface, 2-7 air inlet pipeline, 2-8 air inlet interface, 3 fixed knife lip, 4 moving knife lip, 4-1 moving knife lip, 4-2 moving knife lip body, 4-3 coarse adjusting bolt, 4-4 fine adjusting bolt, 4-5 groove, 5 sealing plate, 5-1 first mounting hole, 5-2 second mounting hole, 6 air nozzle width adjusting mechanism, 6-1 sliding sleeve, 6-2 screw rod, 6-3 inner wind block, 6-4 guide plate, 6-5 fixed block, 6-6 compression spring, 6-7 lower floating block, 6-8 upper floating block, 6-9 pull rods, 6-10 edge limiters, 6-11 sliding seats, 7 edge blowers, 7-1 pipe bodies, 7-2 guide plates, 8 air pipes, 9 air supply speed regulating valves, 10 air supply units and 11 indicator boards.
Detailed Description
For a better understanding of the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.
In the present disclosure, various aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure do not define all aspects of the present disclosure. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any implementation. Additionally, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.
The utility model discloses a thick piece is attached to be used for plastic film production line to cast the attached phenomenon of effect at piece device production, air cock width regulatory function also can not have based on the air knife that is arranged in the plastic film production line to cast the piece device among the prior art can not carry out the accurate fine setting of air cock opening width to and air knife air current horizontal inhomogeneous in the air knife air current chamber, poor to the thick piece adaptability of different width, and thick piece both sides edge, the utility model aims at disclosing a thick piece is attached to be used for plastic film production line to cast the piece device production and uses the air knife, air knife opening width accurate fine setting, air current chamber tolerance compensation, air cock width are adjusted and thick limit both sides edge reinforcing blow limit functions such as limit, effectively improve the application range.
The following will specifically describe the sheet casting device and the air knife of the plastic film production line of the present invention with reference to the accompanying drawings.
Referring to fig. 1 to 3, an air knife for attaching a thick sheet in a sheet casting device on a plastic film production line comprises an air knife body 2, a fixed knife lip 3, a movable knife lip 4, a sealing plate 5 and an air nozzle width adjusting mechanism 6; the air knife body 2 is of a cavity structure with an opening and comprises a semi-cylinder 2-1, a first straight plate 2-2 and a second straight plate 2-3 which are arranged on the side edges of the two sides of the semi-cylinder 2-1 in the length direction in a matching mode, and the ends, far away from the semi-cylinder 2-1, of the first straight plate 2-2 and the second straight plate 2-3 form an opening; the inner pipe 2-4 penetrates through the cavity of the air knife body 2, the inner pipe 2-4 is provided with an air outlet wide slit 2-5 along the length of the inner pipe and in the opposite direction corresponding to the opening, and the air outlet wide slit 2-5 is used for increasing the air flow stroke when the air flow passes through the inner pipe 2-4 and passes through the air outlet wide slit 2-5 and then reversely flows to an air nozzle along the arc inner wall of the semi-cylinder 2-1 of the cavity, so that the effects of pressure stabilization and static pressure on the air flow continuously introduced into the cavity structure are achieved, and the uniformity of the air flow in the.
The fixed knife lip 3 is connected to the end part of the first straight plate 2-2 far away from the semi-cylinder 2-1, and the movable knife lip 4 is connected to the end part of the second straight plate 2-3 far away from the semi-cylinder 2-1; an air nozzle is formed among the fixed cutter lip 3, the movable cutter lip 4 and the opening, the end part of the fixed cutter lip 3, which is far away from the air cutter body 2, is in clearance fit with the end part of the movable cutter lip 3, which is far away from the air cutter body 2, so that an air nozzle opening is formed, and the air nozzle opening faces the attaching direction of the thick sheet 1; the inner side surface of the fixed cutter lip 3, which is contacted with the airflow, is a smooth transition curved surface which is bent towards the side far away from the movable cutter lip 3, and the inner side surface of the movable cutter lip 4, which is contacted with the airflow, is a smooth transition curved surface which is bent towards the fixed cutter lip 3; the air faucet that curved surface structure and the opening of transition formed is favorable to cooperating air knife body 2 to lead the air current of flowing out the opening, and the air current blows on thick piece 1 of casting device production through the air faucet opening again, sticks to the thick piece 1 on the chill roll and plays the thrust effect, and thick piece 1 sticks to and adheres to the chill roll surface under the effect of air current thrust promptly and cools off the shaping.
The sealing plates 5 are arranged on two sides of the air knife body 2 in the length direction and extend to the air tap opening, and the sealing plates 5 are used for forming an air flow chamber containing the air tap opening; the plate surface of the sealing plate 5 corresponding to the inner tube 2-4 is provided with a second mounting hole 5-2, the inner tube 2-4 penetrates through the second mounting hole 5-2 to be connected to an air inlet pipeline 2-7, the air inlet pipeline 2-7 is mounted on a support of the sheet casting device, an air inlet interface 2-8 is arranged on the air inlet pipeline 2-7, the air inlet interface 2-8 is connected with an air supply unit 10, and the air supply unit 10 further supplies air to the cavity of the air knife body 2. In order to ensure the consistency of the attached airflow flowing out of the air knife, the airflow variation in the airflow cavity is compensated at different positions; specifically, a plurality of air quantity compensation interfaces 2-6 are arranged at positions of the semi-cylinder 2-1 corresponding to the air outlet wide slits 2-5, and the air quantity compensation interfaces 2-6 are sequentially connected with an air supply speed regulating valve 9 and an air supply unit 10 through an air pipe 8, so that air quantity compensation of air flow in the air flow chamber is realized.
In some embodiments, the air inlet pipes 2 to 7 are directly inserted into the air knife body, and the pipe structure of the air inlet pipes 2 to 7 located inside the air knife body 2 is configured as the same structure as the inner pipes 2 to 4.
The air tap width adjusting mechanism 6 comprises a sliding sleeve 6-1, a screw 6-2, an inner wind blocking block 6-3 and a guide plate 6-4; a first mounting hole 5-1 is formed in the plate surface of the sealing plate 5 corresponding to the air tap, the end of the sliding sleeve 6-1 is connected with the first mounting hole 5-1, and the interior of the sliding sleeve 6-1 is communicated with the air tap; the screw 6-2 is inserted into the sliding sleeve 6-1 from one end of the sliding sleeve 6-1 far away from the sealing plate 5 and extends to the air tap; the screw 6-2 is matched with the sliding sleeve 6-1 and has the freedom degree of axial sliding adjustment in the sliding sleeve 6-1; the structure of the inner wind block 6-3 close to the opening direction of the air tap is arranged to be matched with the air tap, and the inner wind block 6-3 is arranged in the air tap and connected to the end part of the screw rod 6-2; the guide plate 6-4 and the sliding sleeve 6-1 are arranged at the position of the sealing plate 5 at the same side, the guide plate 6-4 is matched with the airflow cavity, one end of the guide plate passes through the sealing plate 5 to be connected to the side face, close to the air knife body 2, of the inner wind blocking block 6-3, the other end of the guide plate is arranged on the outer side of the sealing plate 5, and the guide plate 6-4 is matched with the sealing plate 5; the screw 6-2 slides axially along the sliding sleeve 6-1, and simultaneously drives the inner wind-blocking block 6-3 and the guide plate 6-4 connected with the inner wind-blocking block 6-3 to move axially along the sliding sleeve 6-1.
The length direction of the semicircular cylinder 2-1 is defined as the length direction of an air knife, the sliding sleeve 6-1 is arranged parallel to the length direction of the air knife, the length of the air knife is recorded as L1, the length of the guide plate 6-4 is recorded as L2, and then L2 is more than or equal to 1/2L1, which shows that when the guide plate 6-4 moves from the installation side sealing plate 5 to the opposite side sealing plate 5, one end of the guide plate 6-4 is always positioned or attached to the outer side of the sealing plate 5, no air flow passes through a part of an air flow chamber partitioned by the guide plate 6-4, and the air flow is partially partitioned by the inner air blocking block 6-3 to pass through the air nozzle, so that the effect of adjusting the width of the air nozzle is achieved, and.
In the utility model, the air nozzle width adjusting mechanisms 6 are symmetrically arranged at two sides of the length direction of the air knife, therefore, the air knife disclosed by the utility model is an axisymmetric structure in the length direction, and thick sheets 1 with various widths produced by the sheet casting device can be attached by adjusting the width of the air nozzle, thereby improving the practicability of air knife attachment; further, although the nozzle width adjusting mechanism 6 may be provided on one side, the position of the slab 1 may not be adjusted when the nozzle width adjusting mechanism is provided in the slab casting apparatus.
In the embodiment shown in the attached drawings, a first gap is arranged in the airflow chamber at the joint of the fixed knife lip 3 and the first straight plate 2-2, a second gap is arranged in the airflow chamber at the joint of the movable knife lip 4 and the second straight plate 2-3, the guide plate 6-4 is clamped between the first gap and the second gap, and the guide plate slides along the first gap and the second gap; in addition, as further shown in fig. 3, an indicator plate 11 connected to the guide plate 6-4 is arranged along the running direction of the guide plate 6-4, and one end of the indicator plate 11 is fixedly connected to the end part of the guide plate 6-4 far away from the sealing plate 5 and moves synchronously with the guide plate 6-4; be provided with the scale on the indicator board 11 for instruct when carrying out air cock width regulation, satisfy the adjustment of accurate reading.
Referring to fig. 4, the length direction of the vertical air knife where the connecting line of the side surface of the inner wind-blocking block 6-3 close to the fixed knife lip 3 and the side surface close to the movable knife lip 4 is defined as the height direction of the inner wind-blocking block 6-3; the inner wind blocking block 6-3 comprises a fixed block 6-5, a compression spring 6-6, an upper floating block 6-8 and a lower floating block 6-7; the fixed block 6-5 is connected with the screw rod 6-2, the fixed block 6-5 is provided with a through hole in the height direction of the inner wind blocking block 6-3, the positions of the upper side and the lower side of the fixed block 6-5, which correspond to the through hole, are provided with grooves, the compression spring 6-6 is arranged in the through hole, and the compression spring 6-6 is always in a compression state; the upper floating block 6-8 is connected with the end part of the compression spring 6-6 close to the movable knife lip 4, the upper floating block 6-8 is freely clamped in the groove at the upper side of the fixed block 6-5, the lower floating block 6-7 is connected with the end part of the compression spring 6-6 close to the fixed knife lip 3, and the lower floating block 6-7 is freely clamped in the groove at the lower side of the fixed block 6-5; the side surface of the upper floating block 6-8 close to the movable knife lip 4 is matched with the inner side surface of the movable knife lip 4, and the side surface of the lower floating block 6-7 close to the fixed knife lip 3 is matched with the inner side surface of the fixed knife lip 3; in actual production, the compression springs 6-6 are always in a compressed state, and the compression amount of the compression springs 6-6 at least enables the upper floating blocks 6-8 and the lower floating blocks 6-7 which are freely clamped in the grooves of the fixed blocks 6-5 to be always attached to the inner side surfaces of the movable knife lip 4 and the fixed knife lip 3, so that the opening degree of an air nozzle opening can be adjusted, effective air flow separation of the air nozzle part can be realized, and the width adjustment of the air nozzle can be effectively realized.
Referring to fig. 5, the screw 6-2 is a hollow structure, a pull rod 6-9 is inserted into an end portion of the screw 6-2 on one side away from the sliding sleeve 6-1, and the pull rod 6-9 penetrates through the screw 6-2 and extends into the air faucet; the pull rod 6-9 is matched with the screw 6-2, so that external air flow cannot axially enter the air nozzle through the screw 6-2, and the pull rod 6-9 has the freedom of axial sliding adjustment in the screw 6-2; the end part of the pull rod 6-9 positioned in the air tap is connected with an edge limiter 6-10; the edge limiter 6-10 is sleeved on the part, located at the air faucet, of the screw rod 6-2, and the edge limiter 6-10 has the freedom degree of sliding on the part, located at the air faucet, of the screw rod 6-2; the edge limiter 6-10 comprises a flow limiting plate, the part of the flow limiting plate penetrates through the air nozzle opening, and the thickness of the flow limiting plate is matched with the air nozzle opening; the flow limiting plate seals the opening of the air tap of the partition part and strengthens the partition effect on the width of the air tap of the partition part of the inner wind blocking block 6-3 and the guide plate 6-4; the material of the current limiting plate is elastic material, so that the current limiting plate can deform and is always matched with the opening of the air tap.
Further combining the embodiment shown in FIG. 3, a sliding seat 6-11 is arranged at the bottom of the edge limiter 6-10, the sliding seat 6-11 is sleeved on the screw 6-2, the pull rod 6-9 pulls the edge limiter 6-10 along the length direction parallel to the air knife, and the edge limiter 6-10 generates the effect of sliding on the screw 6-2; in addition, a sliding groove is formed in the air nozzle part of the screw 6-2, so that the sliding fixing effect can be achieved.
In the embodiment further shown in the attached drawings, the air knife further comprises an edge blowing device 7, the edge blowing device 7 comprises a tube body 7-1 and a guide plate 7-2, and the tube body 7-1 is fixedly connected to the guide plate 6-4; one end of the pipe body 7-1 is connected with an air supply unit 10 through an air pipe 8, the other end of the pipe body penetrates through the sealing plate 5 to be arranged into a flat structure, the flat structure extends into the air faucet along the guide plate 6-4 and is attached to the side face, far away from the edge limiter 6-10, of the inner wind blocking block 6-3; the guide plate 7-2 is arranged at the end part of the pipe body 7-1, which is positioned in the air tap, and is positioned at the outer edge of the pipe orifice of the end part, which is far away from the inner wind block 6-3; the guide plate 7-2 is used for guiding the airflow passing through the pipe body 7-1 to the edges of the two sides of the thick sheet 1; when the edge blowing device is used for production, air flow which is slightly stronger than air flow of the air nozzles is usually provided for the edge blowing device 7, so that the acting force on the edges of the two sides of the slab 1 is increased, and the attaching effect of the two sides of the slab is enhanced.
The utility model is further provided with a moving knife lip adjusting mechanism for precisely adjusting the width of the air tap opening, and particularly, as shown in figure 2, the moving knife lip 4 comprises a moving knife lip 4-1 for forming the air tap opening, a moving knife lip body 4-2 fixedly connected with the second straight plate 2-3 and a moving knife lip adjusting mechanism; the movable knife lip adjusting mechanism comprises a coarse adjusting mechanism and a fine adjusting mechanism, the coarse adjusting mechanism is arranged on the second straight plate 2-3 and comprises a coarse adjusting bolt 4-3, and the end part of the coarse adjusting bolt 4-3 is abutted against the movable knife lip 4; the fine adjustment mechanism is arranged on the movable knife lip body 4-2 and comprises a groove 4-5 and a fine adjustment bolt 4-4 which are arranged on the movable knife lip 4; the groove 4-5 is arranged between the movable knife lip 4-1 and the movable knife lip body 4-2, and the end part of the screw rod of the fine tuning bolt 4-4 penetrates through the groove 4-5 to be abutted against the movable knife lip 4-1; the rough adjusting mechanism realizes the preliminary adjustment of the position of the moving knife lip 4-1, the fine adjusting mechanism realizes the fine opening and the fine closing of the width of the opening of the air nozzle, the consistency of the opening of the air nozzle in the length direction is ensured, and the rough adjusting bolt 4-3 and the fine adjusting bolt 4-4 generally adopt push-pull bolts.
The utility model also discloses a cast sheet device of the plastic film production line provided with the air knife, which comprises a chill roll, an installation support and the like, wherein the cast sheet device adopts the air knife to blow and attach the produced thick sheet 1 to the chill roll for cooling and shaping, and further strengthens the edge blowing effect on the edges of two sides of the attached thick sheet 1, thereby realizing the effective attachment of the two sides of the thick sheet 1 on the chill roll; and the adopted air knife is provided with an air nozzle width adjusting mechanism, the sheet casting device can be suitable for producing the thick sheets 1 with different widths, the application range is enlarged, a foundation is provided for the subsequent processing of the plastic film, and the performance and yield of the thick sheets 1 in the sheet casting process are improved.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The present invention is intended to cover by those skilled in the art various modifications and adaptations of the invention without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims.
Claims (10)
1. An air knife is used for attaching thick sheets in a sheet casting device on a plastic film production line, comprises an air knife body, a fixed knife lip and a movable knife lip, and is characterized by further comprising a sealing plate and an air nozzle width adjusting mechanism;
the air knife body is of a cavity structure with an opening and comprises a semi-cylinder, a first straight plate and a second straight plate, wherein the first straight plate and the second straight plate are arranged on the side edges of the two sides of the semi-cylinder in the length direction in a matching mode;
an inner pipe penetrates through the cavity of the air knife body, an air outlet wide slit is formed in the inner pipe along the length of the inner pipe and in the opposite direction of the corresponding opening, and the air outlet wide slit is used for enabling air to reversely flow to the air nozzle along the semi-cylindrical arc inner wall of the cavity after passing through the air outlet wide slit through the inner pipe, so that the air flow stroke is increased;
the fixed knife lip is connected to the end part of the first straight plate far away from the semi-cylinder, and the movable knife lip is connected to the end part of the second straight plate far away from the semi-cylinder; an air nozzle is formed among the fixed cutter lip, the movable cutter lip and the opening, the end part of the fixed cutter lip, which is far away from the air cutter body, is in clearance fit with the end part of the movable cutter lip, which is far away from the air cutter body, so that an air nozzle opening is formed, and the air nozzle opening faces the thick sheet attaching direction;
the sealing plates are arranged on two sides of the air knife body in the length direction and extend to the air tap opening, and the sealing plates are used for forming an airflow cavity containing the air tap opening;
the air faucet width adjusting mechanism comprises a sliding sleeve, a screw, an inner wind blocking block and a guide plate;
the surface of the sealing plate corresponding to the air tap is provided with a first mounting hole, the end part of the sliding sleeve is connected with the first mounting hole, and the inside of the sliding sleeve is communicated with the air tap; the screw rod is inserted into the sliding sleeve from one end of the sliding sleeve, which is far away from the sealing plate, and extends to the air tap; the screw is matched with the sliding sleeve and has the freedom degree of axial sliding adjustment in the sliding sleeve;
the structure of the inner wind block close to the opening direction of the air faucet is arranged to be matched with the air faucet, and the inner wind block is arranged in the air faucet and connected to the end part of the screw rod; the guide plate and the sliding sleeve are arranged at the sealing plate at the same side, the guide plate is matched with the airflow cavity, one end of the guide plate penetrates through the sealing plate to be connected to the side face, close to the air knife body, of the inner wind blocking block, and the other end of the guide plate is arranged on the outer side of the sealing plate; the screw rod slides axially along the sliding sleeve and drives the inner wind blocking block and the guide plate connected with the inner wind blocking block to move axially along the sliding sleeve;
the length direction of the half cylinder is defined as the length direction of the air knife, the sliding sleeve is arranged along the length direction parallel to the air knife, the length of the air knife is marked as L1, the length of the guide plate is marked as L2, and then L2 is more than or equal to 1/2L 1.
2. The air knife according to claim 1, wherein the direction perpendicular to the length of the air knife, in which the line between the side of the inner wind-blocking block close to the fixed knife lip and the side of the inner wind-blocking block close to the movable knife lip is located, is defined as the height direction of the inner wind-blocking block;
the inner wind blocking block comprises a fixed block, a compression spring, an upper floating block and a lower floating block; the fixed block is connected with the screw rod, a through hole is formed in the fixed block in the height direction of the inner wind blocking block, and grooves are formed in the positions, corresponding to the through hole, of the upper side and the lower side of the fixed block; the compression spring is arranged in the through hole and is always in a compression state; the upper floating block is connected to the end part of the compression spring close to the movable knife lip, the upper floating block is freely clamped in the groove on the upper side of the fixed block, the lower floating block is connected to the end part of the compression spring close to the fixed knife lip, and the lower floating block is freely clamped in the groove on the lower side of the fixed block; the side surface of the upper floating block close to the movable knife lip is matched with the inner side surface of the movable knife lip, and the side surface of the lower floating block close to the fixed knife lip is matched with the inner side surface of the fixed knife lip.
3. The air knife according to claim 1, wherein the screw is a hollow structure, a pull rod is inserted into an end part of the screw, which is far away from the sliding sleeve, and the pull rod penetrates through the screw and extends into the air tap; the pull rod is matched with the screw rod, and the pull rod has the freedom degree of axial sliding adjustment in the screw rod; the end part of the pull rod, which is positioned on the air faucet, is connected with the edge limiter, the edge limiter is sleeved on the part, which is positioned on the air faucet, outside the screw rod, and the edge limiter has the freedom degree of sliding on the part, which is positioned on the air faucet, of the screw rod; the edge limiter comprises a flow limiting plate, the part of the flow limiting plate penetrates out of the air nozzle opening, and the thickness of the flow limiting plate is matched with the air nozzle opening.
4. The air knife of claim 1, further comprising an edge blower; the edge blowing device comprises a pipe body and a guide plate, the pipe body is fixedly connected to the guide plate, one end of the pipe body is connected with the air supply unit through an air pipe, the other end of the pipe body penetrates through the sealing plate to be arranged into a flat structure, the flat structure extends into the air nozzle along the guide plate, and the flat structure is attached to the side face, away from the edge limiting device, of the inner wind blocking block; the guide plate is arranged at the end part of the pipe body, which is positioned in the air faucet, and is positioned at the outer edge of the pipe orifice of the end part, which is far away from the inner wind blocking block; the guide plate is used for guiding the airflow passing through the pipe body to the edges of the two sides of the thick sheet.
5. The air knife according to claim 1, wherein the moving knife lip comprises a moving knife lip opening for forming an air tap opening, a moving knife lip body fixedly connected with the second straight plate and a moving knife lip adjusting mechanism for adjusting the slight opening and the slight closing of the moving knife lip opening;
the movable knife lip adjusting mechanism comprises a coarse adjusting mechanism and a fine adjusting mechanism, the coarse adjusting mechanism is arranged on the second straight plate and comprises a coarse adjusting bolt, and the end part of the coarse adjusting bolt is abutted against the movable knife lip; the fine adjustment mechanism is arranged on the movable knife lip body and comprises a groove and a fine adjustment bolt which are arranged on the movable knife lip; the groove is formed between the movable knife lip mouth and the movable knife lip body, and the end part of the screw rod of the fine adjustment bolt penetrates through the groove to abut against the movable knife lip mouth.
6. The air knife of claim 1, wherein a plurality of air volume compensation interfaces are arranged at positions of the semi-cylinder corresponding to the air outlet wide slits, and the air volume compensation interfaces are sequentially connected to the air supply speed regulating valve and the air supply unit through air pipes.
7. The air knife according to claim 1, wherein the inner side surface of the fixed knife lip contacting with the air flow is configured as a smooth transition curved surface bending towards the side far away from the movable knife lip, and the inner side surface of the movable knife lip contacting with the air flow is configured as a smooth transition curved surface bending towards the fixed knife lip.
8. The air knife of claim 1, wherein a second mounting hole is formed in a plate surface of the sealing plate corresponding to the inner tube, and the inner tube penetrates through the second mounting hole and is sequentially connected to the air inlet pipeline and the air supply unit.
9. The air knife of claim 1, wherein the air tap width adjusting mechanism is symmetrically arranged on two sides of the length direction of the air knife.
10. A casting sheet device of a plastic film production line, which comprises a chill roll and a mounting support, and is characterized by further comprising an air knife as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920276273.7U CN209971458U (en) | 2019-03-05 | 2019-03-05 | Sheet casting device and air knife of plastic film production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920276273.7U CN209971458U (en) | 2019-03-05 | 2019-03-05 | Sheet casting device and air knife of plastic film production line |
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| Publication Number | Publication Date |
|---|---|
| CN209971458U true CN209971458U (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920276273.7U Active CN209971458U (en) | 2019-03-05 | 2019-03-05 | Sheet casting device and air knife of plastic film production line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940850A (en) * | 2019-03-05 | 2019-06-28 | 桂林电器科学研究院有限公司 | The slab device and air knife of plastic film production lines |
| CN116118080A (en) * | 2023-04-10 | 2023-05-16 | 天津市嘉诺缘电子科技有限公司 | Film edge smoothing device |
-
2019
- 2019-03-05 CN CN201920276273.7U patent/CN209971458U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109940850A (en) * | 2019-03-05 | 2019-06-28 | 桂林电器科学研究院有限公司 | The slab device and air knife of plastic film production lines |
| CN109940850B (en) * | 2019-03-05 | 2023-12-12 | 桂林电器科学研究院有限公司 | Sheet casting device and air knife of plastic film production line |
| CN116118080A (en) * | 2023-04-10 | 2023-05-16 | 天津市嘉诺缘电子科技有限公司 | Film edge smoothing device |
| CN116118080B (en) * | 2023-04-10 | 2023-07-14 | 天津市嘉诺缘电子科技有限公司 | Film edge smoothing device |
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Inventor after: Zheng Zhenqin Inventor after: Lai Fugang Inventor after: Tong Bangyi Inventor after: Dai Zhanpeng Inventor after: Mo Zhihua Inventor before: Feng Yonggang Inventor before: Ma Yunhua Inventor before: Jiao Wenhui Inventor before: Xing Lixin Inventor before: Lei Hong |
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