A polyester film blown film machine

Abstract

The utility model discloses a kind of polyester film blowing machine, including cooling air ring, the inside of cooling air ring is equipped with first annular air cavity, annular block is provided in first annular air cavity, Y-shaped flow-through groove is opened in annular block, the center of cooling air ring is rotatably connected with blow cylinder, multiple blow holes are opened in the side of blow cylinder, second annular air cavity is arranged between blow cylinder and annular block, cooling air ring is equipped with drive adjustment component outside;The utility model uses airflow blow to replace radial blow, so that airflow is no longer radial blow, but curve blow flow is even inwards ring, guarantee blow flow even, so that film is blown by airflow stability, by multiple blow holes on blow cylinder circumferential rotation around film, so that the position of blow hole is constantly changed, and then by multiple blow holes of constantly changing position more evenly blow gas onto film, further improve the comprehensiveness and uniformity of film airflow blow flow.

Description

Technical Field

[0001] This utility model relates to the field of polyester film production and processing technology, and in particular to a polyester film blowing machine. Background Technology

[0002] Polyester film (PET film) is a high-performance plastic film made from polyethylene terephthalate (PET). It possesses excellent properties such as high transparency, high mechanical strength, and good chemical stability. Its surface is smooth and flat, it has a wide temperature resistance range, and it also exhibits excellent electrical insulation and barrier properties, effectively preventing moisture, oxidation, and ultraviolet radiation. Polyester film is widely used in packaging, electronics, imaging, and industrial fields. Its environmentally friendly characteristics also support recycling, meeting the needs of sustainable development.

[0003] Polyester film production equipment typically includes a blown film extrusion die. This die has an annular extrusion port. To ensure proper cooling and shaping of the extruded polyester film, a cooling air ring is placed above the die. The annular airflow from this ring cools the extruded film, resulting in a film bubble. Currently, the cooling air ring in blown film machines delivers airflow through an internal annular air guide layer. The airflow is radially blown from the outer air inlet into the inner channel, affecting the inner film. Therefore, the airflow exhibits radial blowing and uneven distribution. As described in Chinese Patent Publication No. CN213082342U, this technical problem is addressed, and a solution is provided. This application offers a different solution.

[0004] Therefore, it is necessary to provide a polyester film blowing machine to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a polyester film blowing machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following solution to the aforementioned technical problems: a polyester film blowing machine includes a cooling air ring, a first annular air chamber inside the cooling air ring, a valve groove on the outer surface of the cooling air ring with a valve inside the groove, an air inlet pipe connected to the valve and communicating with the first annular air chamber, an annular block inside the first annular air chamber, a Y-shaped flow groove communicating with the first and second annular air chambers on the annular block, a blowing cylinder rotatably connected to the center of the cooling air ring, multiple blowing holes on the side of the blowing cylinder, a second annular air chamber between the blowing cylinder and the annular block, and a drive assembly for driving the blowing cylinder to rotate outside the cooling air ring.

[0007] As a further embodiment of this utility model, the drive adjustment assembly includes a gear ring fixed on the outer wall of the air blowing cylinder, a drive motor is provided outside the cooling air ring, and a transmission gear that meshes with the gear ring is fixed on the output end of the drive motor.

[0008] As a further embodiment of this utility model, the Y-shaped flow channel is provided in multiple ways, and the multiple Y-shaped flow channels are arranged in a ring.

[0009] As a further embodiment of this invention, a cover plate is detachably installed at the port of the cooling air ring.

[0010] As a further embodiment of this utility model, bearings are provided between the cover plate and the air blower, and between the air blower and the bottom end of the cooling air ring.

[0011] As a further embodiment of this utility model, the drive motor is fixed to the outer wall of the cover plate by two support rods.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The airflow is delivered to the second annular air chamber through a Y-shaped flow channel in a curved path. When the airflow flows in the Y-shaped flow channel, the flow velocity of the airflow is effectively buffered by the Y-shaped flow channel before being blown out onto the blowing cylinder. Thus, the airflow is evenly blown onto the film through multiple blowing holes on the blowing cylinder. This achieves the use of airflow with a curved path to replace radial blowing, so that the airflow is no longer blown radially, but blown in a curved path and then evenly inward, ensuring uniform blowing and stabilizing the airflow on the film.

[0014] 2. The air blowing cylinder is rotated by the set drive adjustment component, so that the multiple air blowing holes on the air blowing cylinder rotate around the film. This causes the position of the air blowing holes to change continuously, and the gas is blown more evenly onto the film through the multiple air blowing holes with constantly changing positions. This further improves the comprehensiveness and uniformity of the airflow blowing on the film, and further improves the overall cooling efficiency of the film. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a three-dimensional view of the overall structure of this utility model;

[0017] Figure 2 This is a top view of the overall structure of this utility model;

[0018] Figure 3 This is a schematic cross-sectional view of the overall structure of this utility model. Figure 1 ;

[0019] Figure 4 This is a schematic cross-sectional view of the overall structure of this utility model. Figure 2 .

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Drive adjustment assembly; 101. Gear ring; 102. Transmission gear; 103. Drive motor; 3. Cooling air ring; 4. Cover plate; 5. Air inlet pipe; 6. Air blower; 7. Air blow hole; 8. First annular air chamber; 9. Y-shaped flow groove; 10. Valve; 11. Annular block; 12. Second annular air chamber; 13. Bearing. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments.

[0023] Please see Figure 1-4 This utility model provides a polyester film blowing machine, including a cooling air ring 3. The cooling air ring 3 has a first annular air chamber 8 inside. An air valve groove is provided on the outer surface of the cooling air ring 3, and an air valve 10 is provided inside the air valve groove. An air inlet pipe 5 is connected to the air valve 10, and the air valve 10 communicates with the first annular air chamber 8. An annular block 11 is provided inside the first annular air chamber 8. A Y-shaped flow groove 9 is opened on the annular block 11, communicating with the first annular air chamber 8 and a second annular air chamber 12. An air blowing cylinder 6 is rotatably connected to the center of the cooling air ring 3. Multiple air blowing holes 7 are opened on the side of the air blowing cylinder 6. A second annular air chamber 12 is provided between the air blowing cylinder 6 and the annular block 11. A drive assembly 1 for driving the air blowing cylinder 6 to rotate is provided outside the cooling air ring 3. Gas flow is delivered to the air valve 10 through the air inlet pipe 5, and then to the first annular air chamber 8 through the air valve 10. The gas is homogenized and buffered in the first annular air chamber 8 before being delivered to the Y-shaped flow groove 9. Within the Y-shaped flow channel 9, the airflow is transported in a curved path to the second annular air chamber 12. As the airflow flows within the Y-shaped flow channel 9, the flow velocity is effectively further buffered by the Y-shaped flow channel 9 before being blown onto the air blowing cylinder 6. Thus, the airflow is evenly blown onto the film through multiple air blowing holes 7 on the air blowing cylinder 6. This achieves the replacement of radial blowing with airflow flowing in a curved path, so that the airflow is no longer blown radially, but flows evenly inward after curving, ensuring uniform blowing and stabilizing the airflow on the film. The set drive adjustment component 1 drives the air blowing cylinder 6 to rotate, so that the multiple air blowing holes 7 on the air blowing cylinder 6 rotate around the film, thereby constantly changing the position of the air blowing holes 7. This allows the gas to be blown onto the film more evenly through the multiple air blowing holes 7 with constantly changing positions, further improving the comprehensiveness and uniformity of the airflow blowing on the film, and further improving the overall cooling efficiency of the film.

[0024] Further as Figure 1 and Figure 2 As shown, it is worth noting that the drive adjustment component 1 includes a gear ring 101 fixed on the outer wall of the air blowing cylinder 6, and a drive motor 103 is provided on the outside of the cooling air ring 3. A transmission gear 102 that meshes with the gear ring 101 is fixed on the output end of the drive motor 103. In actual operation, the output end of the drive motor 103 drives the transmission gear 102 to rotate, thereby driving the air blowing cylinder 6 to rotate slowly through the cooperation of the transmission gear 102 and the gear ring 101. This causes the multiple air blowing holes 7 on the air blowing cylinder 6 to rotate around the film, thereby causing the position of the air blowing holes 7 to change continuously. In this way, the gas is blown onto the film more evenly through the multiple air blowing holes 7 with constantly changing positions, further improving the comprehensiveness and uniformity of the airflow blowing on the film, and further improving the overall cooling efficiency of the film.

[0025] Further as Figure 3 As shown, it is worth noting that there are multiple Y-shaped flow channels 9 arranged in a ring shape; during operation, the airflow is dispersed and delivered to the air blower 6 through the multiple Y-shaped flow channels 9.

[0026] Further as Figure 1 , Figure 2 and Figure 4 As shown, it is worth noting that a cover plate 4 is detachably installed at the port of the cooling air ring 3. The cover plate 4 is installed on the port of the cooling air ring 3 by multiple screws. In actual operation, the port of the cooling air ring 3 is opened by removing the screws on the cover plate 4, which facilitates the maintenance of the internal parts of the cooling air ring 3.

[0027] This solution has the following working process: Gas is introduced into the valve 10 through the intake pipe 5, and then into the first annular air chamber 8. The gas is homogenized and buffered in the first annular air chamber 8 before being introduced into the Y-shaped flow channel 9. The Y-shaped flow channel 9 guides the gas flow in a curved path into the second annular air chamber 12. While flowing through the Y-shaped flow channel 9, the gas flow velocity is further buffered by the Y-shaped flow channel 9 before being blown onto the blowing cylinder 6. The gas is then evenly blown onto the film through multiple blowing holes 7 on the blowing cylinder 6, thus achieving a curved path... The linear airflow replaces radial airflow, ensuring that the airflow flows evenly inward after a curved path, thus guaranteeing uniform airflow and stabilizing the airflow onto the membrane. The output of the drive motor 103 drives the transmission gear 102 to rotate, which in turn drives the air-blowing cylinder 6 to rotate slowly through the gear ring 101. This causes the multiple air-blowing holes 7 on the air-blowing cylinder 6 to rotate around the membrane, resulting in a continuous change in the position of the air-blowing holes 7. This continuous change in the position of the air-blowing holes 7 allows the gas to be blown onto the membrane more evenly and comprehensively.

[0028] Further as Figure 4 As shown, it is worth noting that bearings 13 are provided between the cover plate 4 and the air blower 6, and between the air blower 6 and the bottom of the cooling air ring 3; during actual operation, the bearings 13 ensure the stability of the air blower 6 when it rotates.

[0029] Further as Figure 1 As shown, it is worth noting that the drive motor 103 is fixed to the outer wall of the cover plate 4 by two support rods.

[0030] In summary: The airflow is delivered to the second annular air chamber 12 via the Y-shaped flow channel 9 in a curved path. When the airflow flows within the Y-shaped flow channel 9, the flow rate is effectively buffered by the Y-shaped flow channel 9 before being blown onto the air blower 6. Thus, the airflow is evenly blown onto the film through multiple air blowing holes 7 on the air blower 6. This achieves the replacement of radial blowing with airflow flowing in a curved path, so that the airflow is no longer blown radially, but flows evenly inward in a curved path, ensuring uniform blowing and stabilizing the airflow on the film. The set drive adjustment component 1 drives the air blower 6 to rotate, so that the multiple air blowing holes 7 on the air blower 6 rotate around the film, thereby constantly changing the position of the air blowing holes 7. This allows the gas to be blown onto the film more evenly through the multiple air blowing holes 7 with constantly changing positions, further improving the comprehensiveness and uniformity of the airflow blowing on the film, and further improving the overall cooling efficiency of the film.

[0031] The drive motor 103 can be purchased from the market. The drive motor 103 is equipped with a power supply. It is a mature technology in this field and has been fully disclosed. Therefore, it will not be described again in the specification.

Claims

1. A polyester film blowing machine, comprising a cooling air ring, characterized in that, The cooling air ring has a first annular air chamber inside. The outer surface of the cooling air ring has a valve groove with a valve inside. An air inlet pipe is connected to the valve and the valve communicates with the first annular air chamber. An annular block is provided in the first annular air chamber. A Y-shaped flow groove communicating with the first and second annular air chambers is opened on the annular block. An air blower is rotatably connected to the center of the cooling air ring. Multiple air blowing holes are opened on the side of the air blower. A second annular air chamber is provided between the air blower and the annular block. A drive assembly for driving the air blower to rotate is provided on the outside of the cooling air ring.

2. The polyester film blowing machine according to claim 1, characterized in that, The drive assembly includes a gear ring fixed to the outer wall of the air blower, a drive motor is provided outside the cooling air ring, and a transmission gear that meshes with the gear ring is fixed on the output end of the drive motor.

3. The polyester film blowing machine according to claim 2, characterized in that, The Y-shaped flow channels are provided in multiple ways, and the multiple Y-shaped flow channels are arranged in a ring.

4. The polyester film blowing machine according to claim 3, characterized in that, A cover plate can be detachably installed at the port of the cooling air ring.

5. The polyester film blowing machine according to claim 4, characterized in that, Bearings are provided between the cover plate and the air blower, and between the air blower and the bottom of the cooling air ring.

6. The polyester film blowing machine according to claim 5, characterized in that, The drive motor is fixed to the outer wall of the cover plate by two support rods.

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