A cast film machine that can be cross-melt stretched

Abstract

The utility model discloses a kind of casting machines that can be transversely melt body stretched, including bed, casting die, traction roller and transverse stretching mechanism.Casting die is set to bed, and casting die is provided with melt body casting mouth, melt body casting mouth is strip-shaped and extends along transverse direction, and casting die can output film piece by melt body casting mouth;Traction roller is rotationally set to bed and is used to drag film piece to move along its length direction;Transverse stretching mechanism is set to bed and is opposite to melt body casting mouth, along the moving direction of film piece, transverse stretching mechanism is located between melt body casting mouth and traction roller, and transverse stretching mechanism can stretch film piece along the width direction of film piece.By using the state that film piece is still at higher temperature when leaving casting die, it is stretched along the width direction of film piece by transverse stretching mechanism, without using reheating mechanism to reheat film piece and then stretching, thereby reducing the number of parts of casting machine, simplify structure and reduce manufacturing cost.

Description

Technical Field

[0001] This utility model relates to casting machines, and more particularly to a casting machine capable of transverse melt stretching. Background Technology

[0002] Existing conventional casting machines include a base, casting die, traction rollers, trimming mechanism, and winding mechanism. The casting die draws the molten metal from the casting nozzle, where it cools and initially solidifies into a film. The film is then pulled by traction rollers that are internally cooled by cooling water, causing the film to narrow and thicken at the edges. After the trimming mechanism removes the edges along the width direction, the film is wound up by the winding mechanism. To adjust the film width, some existing casting machines capable of transverse melt stretching also include a reheating mechanism and a transverse stretching mechanism before the trimming mechanism. The reheating mechanism reheats the film to a certain temperature, improving its stretchability. The transverse stretching mechanism then further stretches the film along its width to increase its width. These transverse melt stretching casting machines are complex in structure and have high manufacturing costs. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a casting machine capable of transverse melt stretching, which simplifies the structure and reduces manufacturing costs.

[0004] A transversely stretchable casting machine according to an embodiment of the present invention includes a machine base, a casting die, a traction roller, and a transverse stretching mechanism. The casting die is disposed on the machine base and has a melt casting orifice that is strip-shaped and extends transversely. The casting die can output a film through the melt casting orifice. The traction roller is rotatably disposed on the machine base and is used to pull the film along its length direction. The transverse stretching mechanism is disposed on the machine base and opposite to the melt casting orifice. Along the direction of film movement, the transverse stretching mechanism is located between the melt casting orifice and the traction roller, and can stretch the film along its width direction.

[0005] The transversely stretchable casting machine according to the present invention has at least the following beneficial effects: by setting the transverse stretching mechanism at a position opposite to the melt casting nozzle, the melt flows out of the melt casting nozzle and is initially formed into a film upon cooling. At this time, the film is still at a relatively high temperature and has good extensibility. Subsequently, the film passes through the transverse stretching mechanism, which stretches the film along its width direction. Then, the film is pulled and moved by the traction roller. By utilizing the fact that the film is still at a relatively high temperature when it leaves the casting die, the transverse stretching mechanism stretches the film along its width direction, suppressing the process of film width reduction and edge thickening while increasing the width of the film. There is no need to use a reheating mechanism to reheat the film before stretching, thereby reducing the number of parts in the casting machine, simplifying the structure, and reducing manufacturing costs.

[0006] According to some embodiments of the present invention, the transverse stretching mechanism includes two pairs of clamping synchronization components, which are arranged at a transverse interval and form a diaphragm widening area between them. The clamping synchronization components can clamp the edge of the diaphragm along its width direction and drive the edge of the diaphragm to move. The direction in which the clamping synchronization components drive the edge of the diaphragm to move is set at an angle to the length direction of the diaphragm.

[0007] According to some embodiments of the present invention, the clamping synchronization assembly includes a belt driver and two synchronous belts. The synchronous belts are provided with clamping sections. The clamping sections of the two synchronous belts are opposite to each other and parallel to each other. A diaphragm clamping position is formed between the two clamping sections. The belt driver is used to drive the synchronous belts to move. The two clamping sections move at the same speed. The moving direction of the clamping section is set at an angle to the length direction of the diaphragm.

[0008] According to some embodiments of the present invention, the moving speed of the clamping segment along the transverse direction is A, which satisfies 0.1m / min≤A≤0.5m / min.

[0009] According to some embodiments of the present invention, the angle between the direction of movement of the edge of the diaphragm driven by the clamping synchronization component and the length direction of the diaphragm is B, which satisfies 30°≤B≤60°.

[0010] According to some embodiments of the present invention, the two clamping synchronization components are arranged symmetrically with respect to the length direction of the diaphragm.

[0011] According to some embodiments of the present invention, the clamping synchronization component has an inlet end and an outlet end, the distance between the inlet ends of the two clamping synchronization components is C, and the distance between the outlet ends of the two clamping synchronization components is D, satisfying 1≤D / C≤4.

[0012] According to some embodiments of this utility model, the distance between the inlet end of the transverse stretching mechanism and the melt casting port is E, which satisfies 15mm≤E≤30mm.

[0013] According to some embodiments of the present invention, the base is provided with a shaping zone and a cooling zone, and the diaphragm passes through the shaping zone and the cooling zone sequentially along the conveying direction.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0016] Figure 1 This is a front view of a portion of the structure of the transversely melt-stretchable casting machine according to an embodiment of the present invention during operation;

[0017] Figure 2 This is a side view of a portion of the structure of the transversely melt-stretchable casting machine according to an embodiment of the present invention during operation;

[0018] Figure 3 This is a three-dimensional schematic diagram of a portion of the working structure of a transversely melt-stretching casting machine according to an embodiment of the present invention.

[0019] Figure label:

[0020] 100 casting die head, 110 melt casting port;

[0021] Lateral stretching mechanism 200, clamping synchronization component 210, timing belt 211, clamping section 2111, inlet end 212, outlet end 213;

[0022] Diaphragm 300. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] Reference Figures 1 to 3 This invention relates to a transversely stretchable casting machine, comprising a machine base, a casting die 100, a traction roller, and a transverse stretching mechanism 200. The casting die 100 is disposed on the machine base and has a melt casting port 110, which is strip-shaped and extends transversely. The casting die 100 can output a film 300 through the melt casting port 110. The traction roller is rotatably disposed on the machine base and is used to pull the film 300 along its length direction. The transverse stretching mechanism 200 is disposed on the machine base and opposite to the melt casting port 110. Along the moving direction of the film 300, the transverse stretching mechanism 200 is located between the melt casting port 110 and the traction roller, and can stretch the film 300 along its width direction.

[0028] By setting the transverse stretching mechanism 200 at a position opposite to the melt casting port 110, the melt flows out of the melt casting port 110 and cools to initially form a film 300. At this time, the film 300 is still at a relatively high temperature and has good ductility. Subsequently, the film 300 first passes through the transverse stretching mechanism 200, which stretches the film 300 along its width direction. Then, the film 300 is pulled and moved by the traction roller. By utilizing the fact that the film 300 is still at a relatively high temperature when it leaves the casting die 100, and stretching the film 300 along its width direction through the transverse stretching mechanism 200, the process of width reduction and edge thickening of the film 300 is suppressed, while the width of the film 300 is increased. There is no need to use a reheating mechanism to reheat the film 300 before stretching, thereby reducing the number of parts in the casting machine, simplifying the structure and reducing manufacturing costs, and increasing the output of casting dies 100 of the same specifications.

[0029] It should be understood that lateral stretching refers to stretching along the width direction of the diaphragm 300.

[0030] In an embodiment, the transverse stretching mechanism 200 includes a pair of clamping synchronization components 210. The two clamping synchronization components 210 are arranged laterally at intervals, and a diaphragm widening area is formed between the two clamping synchronization components 210. The clamping synchronization components 210 can clamp the edge of the diaphragm 300 along its width direction and drive the edge of the diaphragm 300 to move. The direction of movement of the edge of the diaphragm 300 driven by the clamping synchronization components 210 is set at an angle to the length direction of the diaphragm 300.

[0031] Two clamping synchronization components 210 clamp the two edges of the diaphragm 300 along its width direction, thereby driving the edges of the diaphragm 300 to move. Since the direction of movement of the edges of the diaphragm 300 driven by the clamping synchronization components 210 is set at an angle with the length direction of the diaphragm 300, the diaphragm 300 is stretched laterally by using the lateral component velocity. This allows the two clamping synchronization components 210 to stretch the diaphragm 300 laterally at the same time, resulting in a relatively uniform stretching effect without affecting the normal conveying and movement of the diaphragm 300.

[0032] In this embodiment, the clamping synchronization assembly 210 includes a belt driver and two synchronous belts 211. Each synchronous belt 211 has a clamping section 2111. The clamping sections 2111 of the two synchronous belts 211 are opposite to and parallel to each other, forming a diaphragm clamping position between them. The belt driver drives the synchronous belts 211 to move. The two clamping sections 2111 move at the same speed, and their moving direction is at an angle to the length direction of the diaphragm 300. The edge of the diaphragm 300 is clamped by the clamping sections 2111 of the two synchronous belts 211, and the belt driver drives the two clamping sections 2111 to move at the same speed. Because the moving direction of the clamping sections 2111 is at an angle to the length direction of the diaphragm 300, the edge of the diaphragm 300 can also be moved at an angle to its length. The transverse velocity component can stretch the diaphragm 300. The structure is simple, and the clamping and stretching continuity is good.

[0033] Specifically, the belt drive can be a geared motor working in conjunction with a pulley to drive the synchronous belt 211. It is understood that the belt drive can also be other types of drives, and those skilled in the art can choose according to actual needs.

[0034] In this embodiment, the transverse moving speed of the clamping segment 2111 is A, satisfying 0.1 m / min ≤ A ≤ 0.5 m / min. When the transverse moving speed of the clamping segment 2111 is too low, the timing belt 211 needs to occupy a large area, affecting subsequent processes of the diaphragm 300. When the transverse moving speed of the clamping segment 2111 is too high, the diaphragm 300 is prone to breakage. Therefore, setting the transverse moving speed of the clamping segment 2111 to between 0.1 m / min and 0.5 m / min provides a better overall transverse stretching effect and occupies less space.

[0035] It should be understood that the lateral movement rate of the clamping segment 2111 is the rate at which one of the lateral edges of the diaphragm 300 is laterally stretched and deformed. Since the two clamping synchronization components 210 stretch the two lateral edges of the diaphragm 300, the lateral stretching and deformation rate of the diaphragm 300 is between 0.2 m / min and 1 m / min.

[0036] In this embodiment, the angle between the moving direction of the clamping synchronization component 210 and the length direction of the diaphragm 300 is B, satisfying 30°≤B≤60°. The aforementioned moving angle of the synchronization belt 211 provides a good overall lateral stretching effect and occupies less space.

[0037] In this embodiment, the two clamping synchronization components 210 are arranged symmetrically with respect to the length direction of the diaphragm 300, so that the overall lateral stretching effect of the diaphragm 300 is relatively uniform, avoiding large local differences in the thickness of the diaphragm 300.

[0038] In the embodiment, the clamping synchronization component 210 has a film inlet end 212 and a film outlet end 213. The distance between the film inlet ends 212 of the two clamping synchronization components 210 is C, and the distance between the film outlet ends 213 of the two clamping synchronization components 210 is D, satisfying 1≤D / C≤4.

[0039] The diaphragm 300 enters the two clamping synchronization components 210 from the inlet end 212. While being conveyed by the two clamping synchronization components 210, it is also laterally stretched. Finally, the stretched diaphragm 300 exits the clamping synchronization components 210 from the outlet end 213. That is, D / C is the lateral stretching ratio of the diaphragm 300. When the ratio is too large, the diaphragm 300 is easily damaged. Therefore, setting the lateral stretching ratio of the diaphragm 300 to 1 to 4 times can significantly reduce the risk of lateral stretching damage to the diaphragm 300 and improve the stability of the finished product quality.

[0040] Specifically, the value of D / C can also be 2 or 3, etc., without limitation here.

[0041] In this embodiment, the distance E between the inlet end 212 of the transverse stretching mechanism 200 and the melt casting port 110 satisfies 15mm ≤ E ≤ 30mm. If the distance between the melt casting port 110 and the inlet end 212 of the transverse stretching mechanism 200 is too large, the temperature of the diaphragm 300 may be too low and its stretching capacity insufficient when it enters the transverse stretching mechanism 200. If the distance between the melt casting port 110 and the inlet end 212 of the transverse stretching mechanism 200 is too small, the melt may not be initially shaped into the diaphragm 300 when it enters the transverse stretching mechanism 200. Therefore, when the distance between the inlet end 212 of the transverse stretching mechanism 200 and the melt casting port 110 is between 15mm and 30mm, the diaphragm 300 is initially shaped upon entry, and the temperature and stretching capacity are relatively suitable.

[0042] It is conceivable that the lateral stretching mechanism 200 may also include two pairs of chains, each chain having multiple clamps arranged on it. The clamps can clamp the edge of the diaphragm 300. The direction of movement of the chain is at an angle to the direction of movement of the diaphragm 300, so that while the diaphragm 300 moves, the clamps and chains work together to hold and stretch the edge of the diaphragm laterally.

[0043] In this embodiment, the device also includes an edge-cutting mechanism and a winding mechanism. The edge-cutting mechanism is disposed on the machine base and is used to cut off the two ends of the film 300 along its width direction. The winding mechanism is disposed on the machine base and is used to wind up the film 300. The edge-cutting mechanism and the winding mechanism are arranged sequentially along the conveying direction of the film 300.

[0044] When the diaphragm 300 is pulled to the edge trimming mechanism by the traction roller, the two ends of the diaphragm 300 along the width direction can be trimmed to make the diaphragm 300 relatively neat. Then, it is wound into a film roll by the winding mechanism for easy storage and transportation.

[0045] In this embodiment, the machine base 100 is provided with a shaping zone and a cooling zone, and the diaphragm 300 passes through the shaping zone and the cooling zone sequentially along the conveying direction. The temperature of the shaping zone is controlled between 50°C and 80°C, which is beneficial for the rapid shaping of the diaphragm 300. After shaping, it passes through the cooling zone for cooling, and the temperature of the cooling zone is controlled between 30°C and 40°C. After cooling, it can be trimmed and wound up.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cast film machine that is transversely melt stretchable, characterized in that, include: Base; A casting die (100) is disposed on the machine base. The casting die (100) is provided with a melt casting port (110). The melt casting port (110) is strip-shaped and extends laterally. The casting die (100) can output a film (300) through the melt casting port (110). A traction roller is rotatably mounted on the machine base and is used to traction the diaphragm (300) to move along its length. A transverse stretching mechanism (200) is disposed on the machine base and opposite to the melt casting port (110). Along the moving direction of the diaphragm (300), the transverse stretching mechanism (200) is located between the melt casting port (110) and the traction roller. The transverse stretching mechanism (200) can stretch the diaphragm (300) along the width direction of the diaphragm (300).

2. The cross-melt cast stretcher as claimed in claim 1, characterized in that: The transverse stretching mechanism (200) includes a pair of clamping synchronization components (210), which are arranged at a transverse interval and form a diaphragm widening area between them. The clamping synchronization components (210) can clamp the edge of the diaphragm (300) along its width direction and drive the edge of the diaphragm (300) to move. The direction of movement of the edge of the diaphragm (300) driven by the clamping synchronization components (210) is set at an angle to the length direction of the diaphragm (300).

3. The cross-melt cast stretch film casting machine of claim 2, wherein: The clamping synchronization assembly (210) includes a belt driver and two synchronization belts (211). Each synchronization belt (211) is provided with a clamping section (2111). The clamping sections (2111) of the two synchronization belts (211) are opposite to each other and parallel to each other. A diaphragm clamping position is formed between the two clamping sections (2111). The belt driver is used to drive the synchronization belts (211) to move. The two clamping sections (2111) move at the same speed. The moving direction of the clamping section (2111) is set at an angle to the length direction of the diaphragm (300).

4. The cross-melt cast stretcher as claimed in claim 3, characterized in that: The moving speed of the clamping segment (2111) along the transverse direction is A, which satisfies 0.1m / min≤A≤0.5m / min.

5. The cross-melt cast stretcher as claimed in claim 2, wherein: The angle between the moving direction of the edge of the diaphragm (300) driven by the clamping synchronization component (210) and the length direction of the diaphragm (300) is B, which satisfies 30°≤B≤60°.

6. The cross-melt cast stretcher as claimed in claim 2, wherein: The two clamping synchronization components (210) are arranged symmetrically with respect to the length direction of the diaphragm (300).

7. The cross-melt cast stretcher as claimed in claim 2, wherein: The clamping synchronization component (210) has a film inlet end (212) and a film outlet end (213). The distance between the film inlet ends (212) of the two clamping synchronization components (210) is C, and the distance between the film outlet ends (213) of the two clamping synchronization components (210) is D, satisfying 1≤D / C≤4.

8. The cross-melt cast stretcher of claim 1, wherein: The distance between the inlet end (212) of the transverse stretching mechanism (200) and the melt casting port (110) is E, which satisfies 15mm≤E≤30mm.

9. The cross-melt cast stretcher of claim 1, wherein: The machine is provided with a setting zone and a cooling zone, through which the film (300) passes in succession in the direction of transport.

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