PC film stretching forming device

Abstract

A PC film calendering and forming apparatus includes an extrusion die and a calender located below the extrusion die. The extrusion die includes a front template, a rear template, and an adjusting plate. The front and rear templates close to form an extrusion channel. The adjusting plate is installed inside the extrusion channel and adjusts the flow rate at the outlet of the extrusion channel. The calender includes a calender frame, on which, from front to back, are arranged a movable cooling roller, a fixed cooling roller, a cooling support roller, and a flattening roller. A calendering gap is formed between the movable and fixed cooling rollers. The extrusion die is located directly above the calendering gap, and an auxiliary heating plate is provided above the cooling support roller. The advantages of this invention are: the size of the outlet of the extrusion channel is controlled by moving the adjusting plate up and down, thereby adjusting the feeding speed; the structure is simple and the adjustment is convenient and quick; the auxiliary heating plate above the cooling support roller is used to heat the roller surface of the cooling support roller, preventing excessive temperature difference after the PC film is formed and improving the forming quality.

Description

Technical Field

[0001] This utility model relates to the technical field of PC film production equipment, specifically to a PC film calendering and forming device. Background Technology

[0002] PC film forming involves melting and extruding the material using an extruder, then pressing it into a sheet shape using a calender while simultaneously cooling and shaping it. Depending on the desired PC film thickness, the extrusion die's discharge speed and the calender roller spacing need to be adjusted. Existing extrusion die outlet size adjustment mechanisms are complex and time-consuming to operate. After extrusion forming, the PC film is output via cooling rollers. However, existing PC film cooling processes suffer from excessively large temperature differences, which can negatively impact the quality of the formed film during cooling at the output stage. Utility Model Content

[0003] The purpose of this invention is to address the above-mentioned shortcomings by providing a PC film calendering and molding device.

[0004] This utility model includes an extrusion die and a calender located below the extrusion die. The extrusion die includes a front template, a rear template, and an adjusting plate. The front template and the rear template are closed to form an extrusion channel. The adjusting plate is installed in the extrusion channel and adjusts the flow rate at the outlet of the extrusion channel. The calender includes a calender frame, on which a movable cooling roller, a fixed cooling roller, a cooling support roller, and a flattening roller are arranged sequentially from front to back. A calendering gap is formed between the movable cooling roller and the fixed cooling roller. The extrusion die is located directly above the calendering gap, and an auxiliary heating plate is provided above the cooling support roller.

[0005] The upper part of the extrusion channel is a triangular structure with a high middle and low ends, and the cross-section of the extrusion channel is an inverted trapezoidal structure with a wide top and narrow bottom.

[0006] The extrusion channel on the side of the rear template is vertical, while the extrusion channel on the side of the front template is inclined. The adjusting plate is adjustable and installed on the rear template. Adjusting screws that control the up and down movement of the adjusting plate are provided at the bottom of both ends of the rear template.

[0007] The rear template has guide grooves at both ends, and the adjusting plate has guide blocks at both ends that cooperate with the guide grooves. One end of the adjusting screw is in contact with the guide block.

[0008] Both the movable cooling roller and the cooling idler roller are adjustable and mounted on the calender frame via an electric adjusting screw.

[0009] The auxiliary heating plate is an electromagnetic heating plate. The auxiliary heating plate is mounted on the extrusion die head through a support frame. A pair of locking plates are connected to the lower front end of the support frame through a screw. The auxiliary heating plate can be adjusted and mounted on the support frame through a pair of locking plates.

[0010] The advantages of this utility model are: the size of the extrusion channel outlet is controlled by adjusting the up and down movement of the adjustment plate, thereby adjusting the feeding speed. The structure is simple and the adjustment is convenient and quick. An auxiliary heating plate is added above the cooling roller to heat the roller surface of the cooling roller, preventing the temperature difference after the PC film is formed from being too large and improving the forming quality. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the extrusion die structure.

[0013] Figure 3 This is a schematic diagram of the exploded structure of the extrusion die.

[0014] Figure 4 This is a schematic diagram of the cross-sectional structure of the extrusion die.

[0015] Figure 5 This is a schematic diagram of the structure of this utility model in use. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0018] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the utility model. Furthermore, if terms such as "first" or "second" appear in the description of this utility model, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] As shown in the attached figure, the present invention includes an extrusion die 1 and a calender 2 located below the extrusion die 1. The extrusion die 1 includes a front template 3, a rear template 4 and an adjusting plate 5. The front template 3 and the rear template 4 are closed to form an extrusion channel 6. The adjusting plate 5 is installed in the extrusion channel 6 and adjusts the flow rate at the outlet of the extrusion channel 6. The calender 2 includes a calender frame 8, on which a movable cooling roller 9, a fixed cooling roller 10, a cooling support roller 11 and a flattening roller 12 are arranged sequentially from front to back. A calendering gap is formed between the movable cooling roller 9 and the fixed cooling roller 10. The extrusion die 1 is located directly above the calendering gap. An auxiliary heating plate 13 is provided above the cooling support roller 11.

[0021] The regulating plate 5 is used to adjust the flow rate at the outlet of the extrusion channel 6. It adjusts the gap between the movable cooling roller 9 and the fixed cooling roller 10 according to the different thicknesses of PC film, and at the same time controls the flow rate of the extrusion through the extrusion channel 6 to prevent the extruded material from accumulating and overflowing on the movable cooling roller 9 and the fixed cooling roller 10.

[0022] The temperatures of the fixed cooling roller 10, the movable cooling roller 9, and the cooling support roller 11 decrease sequentially. After extrusion, the PC film is pressed and flattened between the fixed cooling roller 10 and the movable cooling roller 9. The temperature of the movable cooling roller 9 is 5-8°C lower than that of the fixed cooling roller 10, which facilitates the smooth peeling of the calendered PC film from the movable cooling roller 9 and its entry onto the cooling support roller 11 around the roller surface of the fixed cooling roller 10. The cooling support roller 11 further cools and shapes the PC film. The auxiliary heating plate 13 is located above the cooling support roller 11 and is used to heat the roller surface of the cooling support roller 11 to prevent the PC film from cooling down too quickly and to improve the quality of the forming.

[0023] The fixed cooling roller 10, the movable cooling roller 9, and the cooling support roller 11 are all controlled by independent motors. The fixed cooling roller 10 and the movable cooling roller 9 are electrically heated rollers. During calendering, the temperature of the fixed cooling roller 10 is 105°C, the temperature of the movable cooling roller 9 is 110°C, and the surface temperature of the cooling support roller 11 is controlled at 75°C.

[0024] Both the movable cooling roller 9 and the cooling support roller 11 can move horizontally on the calender frame 8. By adjusting the gap between the movable cooling roller 9 and the fixed cooling roller 10, the production of PC films of different thicknesses can be adapted. At the same time, the gap between the cooling support roller 11 and the fixed cooling roller 10 can be adjusted according to the thickness of the PC film to adapt the angle at which the PC film enters the cooling support roller 11.

[0025] Preferably, the upper part of the extrusion channel 6 is a triangular structure with a high middle and low ends, and the cross-section of the extrusion channel 6 is an inverted trapezoidal structure with a wide top and narrow bottom.

[0026] The front template 3 and the rear template 4 are equipped with feed pipes at the top closure. The molten material enters the extrusion channel 6 through the feed pipes and then spreads out evenly from the outlet of the extrusion channel 6.

[0027] Preferably, the extrusion channel 6 located on one side of the rear template 4 is vertical, and the extrusion channel 6 located on one side of the front template 3 is inclined. The adjusting plate 5 is adjustablely installed on the rear template 4, and the bottom of both ends of the rear template 4 are respectively provided with adjusting screws 15 for controlling the up and down movement of the adjusting plate 5.

[0028] The rear template 4 has guide grooves at both ends, and the adjusting plate 5 has guide blocks at both ends that cooperate with the guide grooves. One end of the adjusting screw 15 is in contact with the guide block.

[0029] One side of the adjusting plate 5 is attached to the rear template 4. By controlling the up and down movement of the adjusting plate 5, the size of the bottom opening of the extrusion channel 6 can be adjusted, thereby controlling the flow rate of the material being discharged.

[0030] Preferably, both the movable cooling roller 9 and the cooling support roller 11 are adjustablely mounted on the calender frame 8 via an electric adjusting screw 17.

[0031] Both sides of the calender frame 8 are equipped with slide rails, and the movable cooling roller 9 and cooling support roller 11 slide on the slide rails.

[0032] Preferably, the auxiliary heating plate 13 is an electromagnetic heating plate. The auxiliary heating plate 13 is mounted on the extrusion die 1 via a support frame 18. A pair of locking plates 19 are connected to the lower front end of the support frame 18 via screws. The auxiliary heating plate 13 is adjustablely mounted on the support frame 18 via the pair of locking plates 19.

[0033] The length of the locking plate 19 is greater than the width of the auxiliary heating plate 13. After the cooling roller 11 is adjusted, the auxiliary heating plate 13 can also be moved accordingly by adjusting its position on the locking plate 19.

Claims

1. A PC film stretch forming apparatus, characterized by The extrusion die (1) includes a calender (2) located below the extrusion die (1). The extrusion die (1) includes a front template (3), a rear template (4) and an adjusting plate (5). The front template (3) and the rear template (4) close to form an extrusion channel (6). The adjusting plate (5) is installed in the extrusion channel (6) and adjusts the flow rate at the outlet of the extrusion channel (6). The calender (2) includes a calender frame (8), on which a movable cooling roller (9), a fixed cooling roller (10), a cooling support roller (11) and a flattening roller (12) are arranged sequentially from front to back. A calendering gap is formed between the movable cooling roller (9) and the fixed cooling roller (10). The extrusion die (1) is located directly above the calendering gap. An auxiliary heating plate (13) is provided above the cooling support roller (11).

2. The PC film stretch forming apparatus according to claim 1, wherein The upper part of the extrusion channel (6) is a triangular structure with a high middle and low ends, and the cross section of the extrusion channel (6) is an inverted trapezoidal structure with a wide top and narrow bottom.

3. The PC film stretch forming apparatus according to claim 2, wherein The extrusion channel (6) located on one side of the rear template (4) is vertical, and the extrusion channel (6) located on one side of the front template (3) is inclined. The adjustment plate (5) is adjustable and installed on the rear template (4). The bottom of both ends of the rear template (4) are respectively provided with adjustment screws (15) to control the up and down movement of the adjustment plate (5).

4. The PC film calendering apparatus according to claim 3, characterized in that... The rear template (4) is provided with guide grooves at both ends, and the adjustment plate (5) is provided with guide blocks that cooperate with the guide grooves at both ends. One end of the adjustment screw (15) is in contact with the guide block.

5. The PC film stretch forming apparatus according to claim 1, wherein The movable cooling roller (9) and cooling support roller (11) are both adjustable and mounted on the calender frame (8) via an electric adjusting screw (17).

6. The PC film stretch forming apparatus of claim 1, wherein The auxiliary heating plate (13) is an electromagnetic heating plate. The auxiliary heating plate (13) is mounted on the extrusion die (1) via a support frame (18). A pair of locking plates (19) are connected to the lower front end of the support frame (18) via screws. The auxiliary heating plate (13) can be adjusted and mounted on the support frame (18) via a pair of locking plates (19).

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