Film shaping and cooling roller

Abstract

The utility model discloses a film shaping and cooling roller which comprises an outer cylinder and an inner cylinder which are sleeved with each other, the two ends of the outer cylinder are fixedly supported on end shafts through outer cylinder end covers at the corresponding ends, and the two ends of the inner cylinder are fixedly supported on the end shafts through inner cylinder end covers at the corresponding ends; a cold water cavity is formed between the outer cylinder and the inner cylinder which are arranged at intervals, and an end shaft center hole formed in the end shaft leads to the cold water cavity through the cold water hole. A plurality of wave-shaped flow guide discs are arranged on the inner barrel wall of the outer barrel at equal intervals, the cone apex angle alpha of a conical surface where the wave-shaped flow guide discs are located is 100-150 degrees, and the disc walls of the wave-shaped flow guide discs are corrugated surfaces arranged on the conical surface; and a spiral fin is arranged on the outer cylinder wall of the inner cylinder. And the diameter d1 of the central hole of the wave-shaped flow guide disc is greater than the outer diameter d2 of the spiral fin. The spacing distance between every two adjacent wave-shaped flow guide discs is equal to the screw pitch of the spiral fins. The film shaping and cooling roller is good in heat exchange effect and can effectively guarantee the finished product quality of a cast film.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of production equipment of cast film, especially, an improved structure for cast film cooling roller. BACKGROUND

[0002] The cooling and setting effect of film sheet in the cast production process directly affects the production speed and quality of film, and the heat exchange performance of cast roller determines the cooling and setting speed and temperature control effect of molten adhesive film, which will affect the running production efficiency of casting machine on one hand, and will affect the quality of adhesive film on the other hand. If the heat exchange effect of cast roller is insufficient, the thickness of cast adhesive film will be uneven, which will not only affect the tensile strength and barrier property of film, but also cause permanent deformation such as burst of coil surface after curling of adhesive film, which will directly affect the quality of adhesive film. If the cooling and setting temperature of molten adhesive film is not properly controlled, the raw material modification will not be in place, the coupling activation will not be sufficient, the stress of adhesive film will be uneven, which will cause wrinkles, cracking and even defects such as holes in adhesive film, and restrict the improvement of finished product quality of adhesive film. SUMMARY

[0003] In view of the above problems existing in the prior art, the technical problem to be solved by the utility model is to provide a film setting cooling roller with good heat exchange effect and capable of ensuring the quality of cast film.

[0004] In order to solve the above technical problems, the film setting cooling roller of the utility model comprises an outer cylinder and an inner cylinder arranged in the cylinder cavity of the outer cylinder, the two ends of the outer cylinder are fixed and supported on end shafts through outer cylinder end covers at the corresponding ends, and the two ends of the inner cylinder are fixed and supported on end shafts through inner cylinder end covers at the corresponding ends. The outer cylinder and the inner cylinder arranged at a distance from each other form a cold water cavity, and the end shaft holes on the end shafts are connected to the cold water cavity through cold water holes. A plurality of wave-shaped flow guide discs are equidistantly arranged on the inner wall of the outer cylinder, the conical top angle α of the conical surface where the wave-shaped flow guide discs are located is 100°-150°, and the disc wall of the wave-shaped flow guide disc is a corrugated surface arranged on the conical surface. A spiral fin is arranged on the outer cylinder wall of the inner cylinder.

[0005] Preferably, the diameter d1 of the central hole of the wave-shaped flow guide disc is greater than the outer diameter d2 of the spiral fin.

[0006] Preferably, the distance between the adjacent two wave-shaped flow guide discs is equal to the pitch of the spiral fin.

[0007] Preferably, the conical top angle α of the conical surface where the wave-shaped flow guide discs are located is 120°.

[0008] In the technical solution of the present invention, a corrugated guide plate is installed on the inner wall of the outer cylinder. On the one hand, the installation of the corrugated guide plate increases the heat exchange contact area between the outer cylinder and the guide plate and the cooling water. On the other hand, the use of a conical corrugated plate wall can generate cold water flow resistance and eddy currents at the plate wall, extending the contact path and duration between the cold water and the outer cylinder and the corrugated plate wall, strengthening the heat exchange between the cooling water and the outer cylinder, and greatly improving the cooling effect of the outer cylinder. At the same time, spiral vanes are provided on the outer wall of the inner cylinder, which increases the flow path length of the cooling water in the cold water cavity, prolongs the residence time of the cooling water in the cold water cavity, further enhances the heat exchange efficiency between the cooling water and the outer cylinder, and forms a cooling roller structure with good cooling effect. The structure of the present invention is more conducive to the continuous and large-scale production of film casting, improves the casting production efficiency, and ensures the mechanical properties and product quality of the cast film. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The film shaping cooling roller of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0010] Figure 1 This is a cross-sectional structural diagram of a specific embodiment of the film shaping cooling roller of the utility model;

[0011] Figure 2 yes Figure 1 Front structural diagram of the medium corrugated guide plate;

[0012] Figure 3 yes Figure 2 Left view of .

[0013] In the figure, 1 is outer cylinder, 2 is corrugated guide plate, 3 is outer cylinder end cover, 4 is end shaft, 5 is cold water hole, 6 is inner cylinder end cover, 7 is cold water cavity, 8 is inner cylinder, 9 is spiral wing, and 10 is end axis hole. DETAILED DESCRIPTION

[0014] like Figure 1 The film shaping cooling roller shown includes an outer cylinder 1 and an inner cylinder 8, which are spaced apart and nested together, and end shafts 4 at both ends. The outer cylinder 1 and inner cylinder 8 are fixedly mounted on the end shaft 4 at the same end via an outer cylinder end cap 3 and an inner end cap 6, respectively, at the same end. The outer cylinder end cap 3 and the inner end cap 6 at the same end are spaced apart from each other. A cold water chamber 7 is formed between the spaced apart outer cylinder 1 and inner cylinder 8, and a cylinder end cold water channel is formed between the outer cylinder end cap 3 and the inner cylinder end cap 6, which are spaced apart from each other. A core hole 10 is provided in the center of the end shaft 4, which leads to the cold water chamber 7 through a cold water hole 5 on the end shaft 4 and the cylinder end cold water channel.

[0015] A plurality of wave-shaped flow guide discs 2 are fixedly arranged equidistantly on the inner cylinder wall of the outer cylinder 1, and a helical fin 9 is fixedly arranged on the outer cylinder wall of the inner cylinder 8, and the outer diameter of the top of the helical fin 9 is d2.

[0016] As shown in Figure 2 and Figure 3 , the wave-shaped flow guide disc 2 is generally in a conical disc structure, the top angle of the cone of the conical disc is α=120°, and the top angle of the conical surface can also be preferably 100°-150°. The disc wall of the wave-shaped flow guide disc 2 is a corrugated surface, and the diameter of the central hole of the wave-shaped flow guide disc 2 is d1. The diameter d1 of the central hole of the wave-shaped flow guide disc 2 is greater than the outer diameter d2 of the helical fin 9. The interval distance of the adjacent two wave-shaped flow guide discs 2 is equal to the pitch of the helical fin 9.

[0017] Since the wave-shaped flow guide disc 2 is arranged on the inner cylinder wall of the outer cylinder 1, on the one hand, the arrangement of the wave-shaped flow guide disc 2 increases the heat exchange contact area of the outer cylinder and the flow guide disc with the cooling water, and on the other hand, the corrugated disc wall in a conical shape can generate flow resistance and vortex at the disc wall, prolong the contact path and time of the cooling water with the outer cylinder and the corrugated disc wall, and strengthen the heat exchange between the cooling water and the outer cylinder, so that the refrigeration effect of the outer cylinder can be greatly improved. Meanwhile, the helical fin 9 is arranged on the outer wall of the inner cylinder 8, which further increases the flow path length of the cooling water in the cooling water cavity 7, prolongs the residence time of the cooling water in the cooling water cavity 7, and further enhances the heat exchange efficiency between the cooling water and the outer cylinder, thereby forming a cooling roller structure with good refrigeration effect.

[0018] The preferred embodiments of the utility model disclosed above are only used for helping to describe the utility model, according to the content of the specification, many modifications and changes can be made, the specification selects and specifically describes these embodiments, in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor all belong to the protection scope of the utility model.

Claims

1. A film shaping cooling roller, comprising an outer cylinder (1) and an inner cylinder (8), wherein the inner cylinder (8) is arranged in the cylinder cavity of the outer cylinder (1), characterized in that: The two ends of the outer cylinder (1) are fixedly supported on the end shaft (4) through the outer cylinder end covers (3) at the corresponding ends, and the two ends of the inner cylinder (8) are fixedly supported on the end shaft (4) through the inner cylinder end covers (6) at the corresponding ends; a cold water cavity (7) is formed between the outer cylinder (1) and the inner cylinder (8) which are spaced apart from each other, and the end axis center hole (10) arranged on the end shaft (4) leads to the cold water cavity (7) through the cold water hole (5); a plurality of corrugated guide plates (2) are equidistantly arranged on the inner cylinder wall of the outer cylinder (1), the cone vertex angle α of the conical surface where the corrugated guide plates (2) are located is 100°-150°, and the disk wall of the corrugated guide plates (2) is a corrugated surface arranged on the conical surface; spiral fins (9) are arranged on the outer cylinder wall of the inner cylinder (8).

2. The film shaping cooling roller according to claim 1, characterized in that: The diameter d1 of the central hole of the wavy guide plate (2) is larger than the outer diameter d2 of the spiral wing (9).

3. The film shaping cooling roller according to claim 1, characterized in that: The spacing between the two adjacent wavy guide plates (2) is equal to the pitch of the spiral wing (9).

4. The film shaping cooling roller according to claim 1, 2 or 3, characterized in that: The cone apex angle α of the conical surface where the wavy guide plate (2) is located is 120°.

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