阅读说明：本技术 一种用于辊筒除水的风刀装置 (Air knife device for roller dewatering ) 是由 黄耀宇 李雪明 黄静 马茗茗 于 2019-10-29 设计创作，主要内容包括：本发明涉及一种能在不损伤辊筒的前提下有效提高辊筒的除水效果,为薄膜的铸片成型提供质量保障的用于辊筒除水的风刀装置,包括安装在水槽上的固定座、安装在固定座上的摆动气缸、与摆动气缸相连接的摆臂,在摆臂上固定有摆臂支架,在摆臂支架上固定有八字形风刀,摆臂、摆臂支架与八字形风刀组成一个刚性体,八字形风刀包括长风刀和短风刀,两把风刀头部连接呈八字型摆放固定在支架上,风刀出风口与冷辊同心且与辊面法线呈固定角度,在冷辊两侧均设置有边部吹水刀,能在不损伤辊筒的前提下有效提高辊筒的除水效果,同时防止溅起的水滴及杂质对薄膜质量产生影响,为薄膜的铸片成型提供质量保障。(The invention relates to an air knife device for roller dewatering, which can effectively improve the dewatering effect of a roller on the premise of not damaging the roller and provide quality guarantee for the cast sheet forming of a film, and comprises a fixed seat arranged on a water tank, a swing air cylinder arranged on the fixed seat and a swing arm connected with the swing air cylinder, wherein a swing arm bracket is fixed on the swing arm, a splayed air knife is fixed on the swing arm bracket, the swing arm bracket and the splayed air knife form a rigid body, the splayed air knife comprises a long air knife and a short air knife, the head parts of the two air knives are connected and arranged in a splayed shape and fixed on the bracket, the air outlet of the air knife is concentric with a cold roller and forms a fixed angle with the normal line of the roller surface, edge part water blowing knives are arranged on both sides of the cold roller, the dewatering effect of the roller can be effectively improved on the premise of not damaging the roller, and simultaneously the splashed water, and quality guarantee is provided for the cast sheet forming of the film.)

1. The utility model provides an air knife device for roller dewatering, including installing fixing base (9) on basin (1), install swing cylinder (7) on fixing base (9), swing arm (8) that are connected with swing cylinder (7), a serial communication port, be fixed with swing arm support (13) on swing arm (8), be fixed with splayed air knife (5) on swing arm support (13), swing arm (8), a rigid body is constituteed with splayed air knife (5) in swing arm support (13), splayed air knife (5) include long air knife (501) and short air knife (502), two air knife head portions are connected and are the splayed and put and fix on support (13), the air knife air outlet is concentric and be fixed angle with the roll surface normal with cold roll (2), all be provided with limit portion water blowing sword (3) in cold roll (2) both sides.

2. An air knife device for roller dewatering according to claim 1, characterized in that the swing arm (8) is swung by a swing cylinder (7), when in the non-working position, the swing cylinder (7) pushes the swing arm (8) to make the splayed air knife (5) away from the cold roller (2); when the device is in a working position, the air cylinder pushes the swing arm (8) to enable the splayed air knife (5) to be close to the cold roll (2), the splayed air knife is stopped at a position 8mm away from the roll surface, and an adjustable limiting device (10) for preventing the splayed air knife (5) from colliding with the roll surface of the cold roll (2) is arranged at the position.

3. The air knife device for roller dewatering according to claim 1, characterized in that the long air knife (501) and the short air knife (502) are respectively composed of an air inlet pipe, an air deflector and an air knife lip, the air outlets of the long air knife (501) and the short air knife (502) are concentric with the circular arc surface of the roller and form an angle of 60 degrees with the normal line of the roller, and anti-collision protection blocks (503) for double protection of the roller surface are arranged at both ends of the long air knife (501) and the short air knife (502) of the splayed air knife (5).

4. The air knife device for roller dewatering according to claim 1, characterized in that a splash baffle (6) is arranged on the bracket (13) for preventing water drops from splashing when the splayed air knife (5) dries the cold roller surface and affecting the quality of the film.

5. The air knife device for roller dewatering according to claim 1, characterized in that the splayed air knife (5) and the edge water blowing knife (3) are connected with the fan (11) through the air pipe (4), the air pipe (4) is provided with an air adjusting valve (12) which can independently adjust the air intake at each position, and the fan (11) can realize variable frequency speed regulation.

6. The air knife device for roller dewatering according to claim 1, characterized in that the edge water blowing knives (3) are located on both sides of the splayed air knife (5) and are installed at both ends of the cold roller (2) in parallel with the central line of the cold roller (2).

7. The air knife device for roller dewatering of claim 1, characterized in that: the adjustable limiting device (10) comprises a top block arranged on the inner side face of the fixing seat (9), a bolt penetrates through the top block, the top end of the bolt is in contact with the side face of the swing arm (8) after the bolt penetrates through the top block, and the effect of limiting adjustment is achieved.

8. The air knife device for roller dewatering of claim 1, characterized in that: splash guard (6) are L type structure and pass through the bolt fastening on swing support (13), and splash guard (6) can be along with swing support (13) and swing under the effect of both sides swing cylinder (7).

9. The air knife device for roller dewatering of claim 1, characterized in that: swing cylinders (7) are arranged on the fixing seats (9) on the two sides, the tail portions of the swing cylinders (7) are movably connected with the fixing seats (9) through cylinder tailstocks and pin shafts, and the end portions of the swing cylinders (7) are movably connected with swing arms (8) through Y-shaped joints.

10. The air knife device for roller dewatering according to claim 3, characterized in that the anti-collision protection block (503) is a U-shaped protection block made of nylon material.

Technical Field

The invention belongs to the technical field of plastic film production, and particularly relates to an air knife device for roller dewatering, which can effectively improve the dewatering effect of a roller on the premise of not damaging the roller and provide quality guarantee for the molding of a film cast piece.

Background

In the cast sheet forming process of a film stretching production line, a molten polymer is extruded from a die head and then is rapidly attached to the surface of a high-polishing, chromium-plating and low-temperature chill roll for cooling and forming, in the existing chill roll-water tank cooling method, a film needs to be soaked in cooling water for cooling the film sheet, if the water on the chill roll is not completely removed, the attaching effect of the cast sheet is affected, and the film is easy to form phenomena of hollowing, uneven thickness and the like. In the prior art, a mode of a wringing roller and a transverse air knife is adopted, and water is easy to rotate above a roller and cannot be discharged from the surface of the roller when the transverse air knife is used, so that the production quality of a film is influenced. Patent publication No. CN204123653 just discloses such a mode that adopts wringing roller to add horizontal air knife clears away water on the cold roll, and it concretely relates to membrane casting piece cooling device with water pressing splashproof mechanism, including chill roll, dewatering air knife, cooling air knife and the export guide roll of installing in the frame, still be equipped with the water pressing roller that contacts with the chill roll between export guide roll and the dewatering air knife, be equipped with between dewatering air knife rear side and the membrane casting piece and install in the frame and be perpendicular to the breakwater that is used for blockking that the water droplet backward flow splashes that is used for of chill roll, can make the water stain on chill roll surface pass through the extrusion of water pressing roller before the dewatering air knife, with most water stain on the chill roll by being extruded to chilling in the basin, through removing except that

The water air knife air dries to remove water droplets from the chill roll, but with the water removal air knife water tends to rotate above the roll and not drain from the roll surface. Patent publication No. CN206855981 discloses a chill roll double-effect water trap, including install chill roll and driving roller in the chill roll frame, install first deflector roll, second deflector roll and third deflector roll on two-way water trap mechanism support, be equipped with 3-6mm clearance between driving roller and the chill roll of installing in the chill roll frame, be equipped with two-way water trap mechanism on the two-way water trap mechanism support, two-way water trap mechanism is located between first deflector roll and the second deflector roll, two-way water trap mechanism communicates with the fan that sets up in two-way water trap mechanism support outside through the pipeline respectively, and its advantage is that not only can avoid chill roll surface damage, reinforcing dewatering effect; but also can greatly reduce the processing cost of the film and improve the appearance quality of the film product, but the technical proposal has not good water removing effect on removing water drops of the chill roll as compared with the patent publication No. CN204123653, and only removes the water drops on the film.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the air knife device for roller dewatering, which can effectively improve the dewatering effect of the roller and improve the molding quality of a cast sheet of a film.

The purpose of the invention is realized as follows: the utility model provides an air knife device for roller dewatering, including installing the fixing base on the basin, install the swing cylinder on the fixing base, the swing arm that is connected with the swing cylinder, be fixed with the swing arm support in the swing arm, be fixed with splayed air knife on the swing arm support, the swing arm, a rigid body is constituteed with splayed air knife to the swing arm support, splayed air knife includes long air knife and short air knife, two air knife head portions are connected and are the splayed and put and fix on the support, the air knife air outlet is concentric and be fixed angle with the roll surface normal with the cold roll, all be provided with limit portion water blowing sword in the cold roll both sides.

The swing arm is swung through a swing cylinder, and when the swing arm is in a non-working position, the swing cylinder pushes the swing arm to enable the splayed air knife to be far away from the cold roll; when the working position is reached, the air cylinder pushes the swing arm to enable the splayed air knife to be close to the cold roll and stop at a position 8mm away from the roll surface, and an adjustable limiting device for preventing the splayed air knife from colliding with the roll surface of the cold roll is arranged at the position.

The long air knife and the short air knife respectively consist of an air inlet pipe, an air deflector and an air knife lip, the air outlets of the long air knife and the short air knife are concentric with the arc surface of the roller and form an angle of 60 degrees with the normal line of the roller, and anti-collision protection blocks for carrying out double protection on the roller surface are arranged at the two ends of the long air knife and the short air knife of the splayed air knife.

And a splash baffle for preventing water drops from splashing to influence the quality of the film when the splayed air knife is used for drying the cold roll surface is arranged on the swing bracket.

The splayed air knives and the edge water-blowing knives are connected with the fan through the air pipes, the air pipes are provided with air regulating valves which can independently regulate air input at all positions, and the fan can realize frequency conversion and speed regulation.

The edge water blowing knives are positioned on two sides of the splayed air knife and are parallel to the central line of the cold roll and are arranged at two ends of the cold roll.

The adjustable limiting device comprises a top block arranged on the inner side surface of the fixing seat, a bolt penetrates through the top block, the top end of the bolt is in contact with the side surface of the swing arm after the bolt penetrates through the top block, and the effect of limiting adjustment is achieved.

The splash guard is L-shaped and is fixed on the swing support through bolts, and the splash guard can swing under the action of the swing cylinders on the two sides along with the swing support.

All be provided with the swing cylinder on the fixing base of both sides, the afterbody of swing cylinder passes through cylinder tailstock and round pin axle and fixing base swing joint, and the tip of swing cylinder passes through Y type and connects and swing arm swing joint.

The anti-collision protection block is a U-shaped protection block made of nylon materials.

Compared with the prior art, the invention has the beneficial effects that: the design is a roller dewatering air knife device for a film production line, the device can effectively improve the dewatering effect of the roller under the premise of not damaging the roller, simultaneously prevent splashed water drops and impurities from influencing the quality of the film, and provide quality guarantee for the molding of cast sheets of the film.

Drawings

FIG. 1 is a front view of the air knife device for roll dewatering of the present invention.

FIG. 2 is a top view of the air knife device for roll dewatering of the present invention.

FIG. 3 is a schematic structural diagram of a splayed air knife of the air knife device for roller dewatering.

Reference numbers in the figures: 1. the air conditioner comprises a water tank, 2 parts of a cold roll, 3 parts of an edge water blowing cutter, 4 parts of an air pipe, 5 parts of a splayed air cutter, 501 parts of a long air cutter, 502 parts of a short air cutter, 503 parts of a protection block, 6 parts of a gradual baffle, 7 parts of a swing air cylinder, 8 parts of a swing arm, 9 parts of a fixed seat, 10 parts of a limiting device, 11 parts of a fan, 12 parts of an air regulating valve and 13 parts of a swing support.

Detailed Description

The present invention is further illustrated by the following specific examples.

The air knife device for dewatering the roller comprises a splayed air knife 5, an edge water blowing knife 3, a cylinder swing arm assembly, a gradual baffle, a limiting device and the like.

The air knife device for dewatering the roller is provided with a pair of air knife structures which are arranged in a splayed shape, and an air outlet of each air knife is concentric with the arc surface of the roller, forms a certain angle with the normal line of the roller and blows air towards the axis of the cold roller; the splayed air knife is fixed on a swing arm support pushed by the air cylinder. When the air knife assembly does not work, the air cylinder pushes the swing arm to act so that the air knife assembly is far away from the roller; when the during operation resets, cylinder promotion air knife subassembly is close to the roller and apart from roller roll surface 8mm, is provided with stop device in the position department of working and prevents dewatering air knife and roller contact, installs on the swing arm support and prevents gradually the water droplet that the baffle can absorb splash on the roller and prevent that water droplet and impurity from producing the influence to the film quality. In order to improve the dewatering effect of the end part of the roller, edge part water blowing knives are further arranged at the two ends of the roller, the edge part water blowing knives are connected with a fan on one side through a pipeline, and an air adjusting valve is arranged on the pipeline and can independently adjust the air inlet amount.