Casting adhesive film shaping temperature control device

Abstract

The utility model discloses a casting adhesive film shaping temperature control device which comprises a temperature control box body, two air uniformizing pore plates are fixedly installed in the temperature control box body, and an adhesive film conveying belt penetrates through the middle of the two air uniformizing pore plates which are parallel to each other and spaced. Temperature control cavities are formed between the air uniformizing pore plate and the top wall and the bottom wall of the temperature control box body, and each temperature control cavity is divided into a plurality of temperature control unit cavities through temperature control cavity partition plates; an electric heater, a cold air pipe opening and an air blower are arranged in each temperature control unit cavity. A plurality of through holes are evenly distributed in the plate face of the air uniformizing hole plate. The cold air pipe opening is communicated with one end of a cold air generating pipe, the other end of the cold air generating pipe is communicated with an air outlet of an air blower, and the cold air generating pipe is arranged in the cold water cabinet. A circulating water inlet of the cold water cabinet is communicated with a water outlet of the cooling-water machine; and a circulating water outlet of the cold water cabinet is communicated with a water inlet of the cooling-water machine. The sizing temperature control device has the characteristics of high casting production efficiency and stable casting film quality.

Description

Technical Field

[0001] This utility model relates to a production equipment for making cast film, and more particularly to a film shaping and temperature control device for a cast film forming machine with a film conveyor belt. Background Technology

[0002] Cast film is a type of non-stretched, non-oriented flat extruded film produced by rapidly cooling melt flow. It boasts excellent transparency, gloss, and thickness uniformity. Currently, film casting equipment mainly consists of a film extrusion die and multiple pairs of opposing steel and rubber rollers forming a roller pair. The primary function of the roller pair is to cool and shape the extruded film and to press patterns onto it. The main casting processes are essentially two methods: one is to first emboss the film on the rollers and then cool and shape it; the other is to first cool and shape it and then emboss it. Correspondingly, the film casting equipment still relies on rotating cooling rollers for cooling. In this existing structure, since the contact angle and arc length between the film and the cooling rollers are always fixed, to achieve the ideal cooling and shaping effect, the cooling roller speed must be reduced to extend the cooling time. However, reducing the cooling roller speed inevitably leads to a decrease in the casting machine's operating efficiency. Therefore, the existing structure relying on cooling rollers for cooling and shaping the extruded film has become a bottleneck for improving the production efficiency of casting machines. Furthermore, the extruded film still maintains a high temperature. The direct embossing contact between the molten film and the rollers at this temperature easily leads to adhesion between the film and the rollers, resulting in low surface smoothness, wrinkles, and cracking, thus reducing yield and causing significant material waste. Moreover, the ambient temperature of the molten film extruded from the die directly affects its quality. Improper temperature control can lead to inadequate raw material modification, insufficient coupling activation, and uneven stress across the film, easily causing wrinkles, cracks, and even holes. Clearly, existing film casting machines have not addressed this technical characteristic, thus hindering the improvement of finished film quality. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a casting film shaping and temperature control device with high casting production efficiency and stable casting film quality.

[0004] To solve the above-mentioned technical problems, the present invention provides a casting film shaping and temperature control device, comprising a temperature control chamber, wherein two air distribution plates are fixedly installed inside the temperature control chamber, and the film conveyor belt passes through the middle of the two parallel and spaced air distribution plates; the air distribution plates form temperature control cavities between the top and bottom walls of the temperature control chamber, and each temperature control cavity is divided into several temperature control unit cavities by temperature control cavity partitions; each temperature control unit cavity is provided with an electric heater, a cold air inlet, and a blower.

[0005] Furthermore, the surface of the air distribution plate is evenly distributed with several through holes.

[0006] Furthermore, the cold air duct is connected to one end of the cold air generating pipe, and the other end of the cold air generating pipe is connected to the air outlet of the blower. The cold air generating pipe is installed in the chilled water tank.

[0007] Furthermore, the circulating water inlet of the chilled water tank is connected to the water outlet of the chiller; the circulating water outlet of the chilled water tank is connected to the water inlet of the chiller.

[0008] Furthermore, the cold air duct outlet is connected to the end of the cold air generating duct via a cold air duct control valve, which is an electromagnetic shut-off valve.

[0009] Furthermore, the blower is an axial flow fan, the blower is a centrifugal fan, and the chiller is a compression chiller.

[0010] Furthermore, the film conveyor belt is a mesh belt or a woven belt; the surface of the film conveyor belt is provided with a patterned structure.

[0011] In the technical solution of this utility model, since the extruded film, which is in a molten state and is relatively hot, does not directly enter the cooling rollers for cooling, the extruded film in a molten state is fed onto the film conveyor belt for temperature-controlled casting and shaping. Therefore, the molten film can obtain sufficient film shaping time and shaping path length on the conveyor belt, without being limited by the size and arc length of the cooling wrap angle of the cooling rollers. This can greatly improve the conveying speed of the film on the conveyor belt, thereby greatly improving the casting operation efficiency of the casting machine. Furthermore, since the molten extruded film passes through the film temperature control device along with the film conveyor belt, the film temperature control device can adjust and control the cooling rate of the film and the duration of film temperature control through heating or cooling devices to create the optimal film environment temperature. Moreover, by setting different temperature control sections in the film temperature control device, precise temperature control can be achieved, ensuring that the film modification is in place, the coupling activation is sufficient, and the unevenness of the film stress in all directions can be effectively eliminated. Through the optimization of the film setting temperature, the formation of wrinkles, bursting, cracks, and holes in the film is completely avoided, thereby effectively improving and stabilizing the quality of the film product while ensuring the efficiency of casting production. Attached Figure Description

[0012] The present invention provides a more detailed description of the casting film shaping and temperature control device in conjunction with the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of a specific embodiment of the casting film shaping and temperature control device of this utility model.

[0014] In the diagram, 1—temperature control chamber, 2—film conveyor belt, 3—film, 4—electric heater, 5—cold air duct inlet, 6—blower, 7—cold air duct control valve, 8—temperature control chamber partition, 9—air distribution perforated plate, 10—cold air generating pipe, 11—heat exchange cabinet, 12—chilled water, 13—chiller, 14—blower. Detailed Implementation

[0015] like Figure 1 The temperature control device for setting and shaping the cast film shown includes a temperature control box 1, which has a rectangular tube structure. Narrow inlet and outlet ports are respectively provided on the end plates at both ends of the temperature control box 1 for the film conveyor belt 2 and the film 3 on it to pass through and exit.

[0016] Two air-distributing perforated plates 9 are horizontally arranged at intervals within the cavity of the temperature control chamber 1, forming a horizontal channel between the two plates for the passage of the film conveyor belt 92 and the film 93. The upper air-distributing perforated plate 9 and the top wall of the temperature control chamber 1 form the upper temperature control cavity, and the lower air-distributing perforated plate 9 and the bottom wall of the temperature control chamber 1 form the lower temperature control cavity. Several circular through holes of the same diameter are evenly distributed on the air-distributing perforated plates 9.

[0017] Both the upper and lower temperature control chambers are divided into three temperature control unit chambers by temperature control chamber partitions 8. Each temperature control unit chamber is equipped with a blower 6 for supplying air to the unit chamber. A cold air inlet 5 and an electric heater 4 are installed on either side of the blower 6. The blower 6, cold air inlet 5, and electric heater 4 located in the upper temperature control unit chamber are mounted on the top wall of the temperature control chamber 1. Similarly, the blower 6, cold air inlet 5, and electric heater 4 located in the lower temperature control unit chamber are mounted on the bottom wall of the temperature control chamber 1.

[0018] The heat exchanger 11 is a closed cabinet containing chilled water 12, which is purified or pure water. The circulating water outlet of the heat exchanger 11 is connected to the inlet of the chiller 13, and the circulating water inlet of the heat exchanger 11 is connected to the outlet of the chiller 13. A cold air generating pipe 10 is immersed in the chilled water 12 in the heat exchanger 11. Both ends of the cold air generating pipe 10 extend out of the cabinet wall of the heat exchanger 11. The lower end of the cold air generating pipe 10 is connected to the air outlet of the blower 14, and the upper end of the cold air generating pipe 10 is connected to the corresponding cold air duct port 5 through a cold air duct control valve 7, which is a solenoid shut-off valve. The chiller 13 is a common compressor-type air cooler; the blower 6 is an axial flow fan; and the blower 14 is a centrifugal fan.

[0019] In the above structure, since both the upper and lower temperature control chambers are divided into several temperature control unit chambers, the temperature of the adhesive film 3 on the adhesive film conveyor belt 2 can be adjusted and controlled in sections. This allows for different heating and activation temperature parameters to be applied to different adhesive film material components, achieving ideal modification and activation effects. Accordingly, the number of temperature control unit chambers separating the upper and lower temperature control chambers is not limited to three, but should be determined based on specific design conditions. The temperature control unit chambers can create a uniform temperature-controlled airflow through the homogenization effect of the chambers. This airflow is then blown onto the adhesive film conveyor belt 2 and the adhesive film 3 through the air distribution perforated plate 9, ensuring that the temperature-controlled airflow evenly affects the upper and lower surfaces of the adhesive film.

[0020] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. Many modifications and variations can be made based on the content of this specification. The selection and detailed description of these embodiments are intended to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A temperature control device for setting and shaping cast adhesive film, characterized in that: The device includes a temperature control chamber (1), in which two air distribution perforated plates (9) are fixedly installed. A film conveyor belt (2) passes through the middle of the two parallel and spaced air distribution perforated plates (9). The air distribution perforated plates (9) form temperature control cavities between the top wall and the bottom wall of the temperature control chamber (1), respectively. Each temperature control cavity is divided into several temperature control unit cavities by a temperature control cavity partition (8). Each temperature control unit cavity is equipped with an electric heater (4), a cold air duct (5), and a blower (6).

2. The casting film shaping and temperature control device according to claim 1, characterized in that: The surface of the uniform air distribution plate (9) is evenly distributed with several through holes.

3. The casting film shaping and temperature control device according to claim 1 or 2, characterized in that: The cold air inlet (5) is connected to one end of the cold air generating pipe (10), and the other end of the cold air generating pipe (10) is connected to the air outlet of the blower (14). The cold air generating pipe (10) is installed in the cold water tank (11).

4. The casting film shaping and temperature control device according to claim 3, characterized in that: The circulating water inlet of the chilled water tank (11) is connected to the outlet of the chiller (13); the circulating water outlet of the chilled water tank (11) is connected to the inlet of the chiller (13).

5. The casting film shaping and temperature control device according to claim 1, characterized in that: The cold air duct (5) is connected to the end of the cold air generating pipe (10) through the cold air duct control valve (7), which is an electromagnetic shut-off valve.

6. The casting film shaping and temperature control device according to claim 4, characterized in that: The blower (6) is an axial flow fan, the blower (14) is a centrifugal fan, and the chiller (13) is a compression chiller.

7. The casting film shaping and temperature control device according to claim 1, characterized in that: The film conveyor belt (2) is a mesh belt or a woven belt; the surface of the film conveyor belt (2) is provided with a patterned structure.

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