Double-air-duct inner cold air ring for film blowing mold

Abstract

The utility model relates to the technical field of inner cold air rings, in particular to a double-air-duct inner cold air ring for a film blowing mold. Comprising an inner cold air ring body, an annular partition plate is fixedly connected to the interior of the inner cold air ring body, the top of the inner cold air ring body fixedly communicates with an inner cold chimney, the bottom of the inner cold air ring body fixedly communicates with a plurality of air outlet pipes, and air inlet pipes communicating with the inner cold air ring body are arranged at the positions, located on one sides of the multiple air outlet pipes, of the bottom of the inner cold air ring body; a plurality of exhaust holes are formed in the side wall of the inner cold air ring body. According to the cooling device, the air inlet amount is effectively increased, the cooling effect and the thickness uniformity of a film are improved, and meanwhile, the brightness of the film is improved due to the fact that cooling is faster.

Description

Technical Field

[0001] The utility model relates to the technical field of internal air cooling rings, in particular to a double-air-channel internal air cooling ring for a blown film die. Background Art

[0002] In the traditional blown film process, the cooling system usually adopts a single-air-channel internal air cooling ring. Although this air cooling ring can achieve a certain degree of cooling effect, there are some deficiencies. For example, the single-air-channel design makes the distribution of the cooling air volume uneven, which easily leads to non-uniformity in the thickness direction of the film, thereby affecting the physical properties and optical properties of the film. In addition, the single-air-channel internal air cooling ring is difficult to provide sufficient cooling capacity during high-speed production, which limits the improvement of production efficiency. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is that the internal air cooling ring in the prior art adopts a single-air-channel air inlet mode, with a compact structure, and can only have half of the air inlet and half of the air outlet, resulting in limited air inlet volume and poor cooling effect.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a double-air-channel internal air cooling ring for a blown film die, including an internal air cooling ring main body, wherein an annular partition is fixedly connected inside the internal air cooling ring main body, an internal cold chimney is fixedly communicated with the top of the internal air cooling ring main body, a plurality of air outlet pipes are fixedly communicated with the bottom of the internal air cooling ring main body, an air inlet pipe communicated with the internal air cooling ring main body is arranged on one side of the plurality of air outlet pipes at the bottom of the internal air cooling ring main body, and a plurality of exhaust holes are arranged on the side wall of the internal air cooling ring main body.

[0005] As a further improvement of the utility model, the number of the air outlet pipes and the air inlet pipes is the same and they correspond to each other, and the number of the air outlet pipes and the air inlet pipes is not less than six and they are evenly distributed.

[0006] As a further improvement of the utility model, the air outlet pipes are located inside the annular partition, and the air inlet pipes are located outside the annular partition.

[0007] The beneficial effects of the utility model: The double-air-channel internal air cooling ring provided by the utility model has the same installation position as the original single-air-channel internal air cooling ring, with air inlet on one side and air outlet on the other side. The number of the air inlets and air outlets has doubled, effectively increasing the air inlet volume, improving the cooling effect and the thickness uniformity of the film. At the same time, due to faster cooling, the brightness of the film is improved. Description of the Drawings

[0008] Figure 1 is the overall structural schematic diagram of a double-air-channel internal air cooling ring for a blown film die of the utility model;

[0009] Figure 2It is a partial cross-sectional view of a double-air-channel internal cold air ring for a blown film die of the present utility model;

[0010] Figure 3 It is a schematic plan view of a double-air-channel internal cold air ring for a blown film die of the present utility model.

[0011] As shown in the figure: 1. Main body of the internal cold air ring; 2. Annular partition; 3. Internal cold chimney; 4. Air outlet pipe; 5. Air inlet pipe; 6. Exhaust holes. Specific embodiments

[0012] In this specification, the orientation terms such as upper, lower, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned are defined relative to its structure, and they are relative concepts. Therefore, it may change accordingly according to its different positions and different usage states; so, these or other orientation terms should not be interpreted as restrictive terms.

[0013] In this specification, the singular forms "a", "the" and "said" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term " / and" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0014] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further details this application in combination with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are only used to explain this application and are not used to limit this application.

[0015] The present utility model provides a double-air-channel internal cold air ring for a blown film die as shown in the attached Figures 1-3 figure, which includes a main body 1 of the internal cold air ring. An annular partition 2 is fixedly connected inside the main body 1 of the internal cold air ring. An internal cold chimney 3 is fixedly communicated with the top of the main body 1 of the internal cold air ring. A plurality of air outlet pipes 4 are fixedly communicated with the bottom of the main body 1 of the internal cold air ring. An air inlet pipe 5 communicated with the main body 1 of the internal cold air ring is provided on one side of the plurality of air outlet pipes 4 at the bottom of the main body 1 of the internal cold air ring. A plurality of exhaust holes 6 are provided on the side wall of the main body 1 of the internal cold air ring.

[0016] In the present invention, the number of the air outlet pipes 4 and the air inlet pipes 5 is the same and they correspond to each other. The number of the air outlet pipes 4 and the air inlet pipes 5 is not less than six and they are evenly distributed; the air outlet pipes 4 are located inside the annular partition 2, and the air inlet pipes 5 are located outside the annular partition 2.

[0017] Working principle: When the present utility model is specifically implemented, cooling air is introduced into the interior of the inner cold air ring main body 1 through the inner cold chimney 3. The annular partition 2 divides the interior space of the inner cold air ring main body 1 into two independent air ducts, corresponding to the air inlet pipe 5 and the air outlet pipe 4 respectively. The cooling air is introduced into the inner air duct on the inner side of the interior of the inner cold air ring main body 1 and is blown towards the film being blown through the multiple air outlets of the air outlet pipe 4, thereby achieving uniform cooling. At the same time, the gas discharged from the air outlet pipe 4 can enter the outer air duct inside the inner cold air ring main body 1 through the air inlet pipe 5 again, and finally the excess cooling air is discharged in a timely manner through the exhaust holes 6 to prevent the cooling air from accumulating inside the inner cold air ring main body 1 and ensure the smooth flow of the cooling air. Through the design of the double air ducts, both the air inlet volume and the air outlet volume are significantly increased, making the cooling effect more uniform and efficient. This uniform cooling effect helps to reduce the non-uniformity of the film in the thickness direction, thereby improving the physical properties and optical properties of the film. At the same time, due to the improvement of the cooling efficiency, the production speed of the film can be increased, thereby improving the production efficiency.

[0018] The above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A double-channel inner cooling air ring for a film blowing mold, comprising an inner cooling air ring body (1), characterized in that: The inner cooling air ring body (1) is fixedly connected with an annular partition plate (2), the top of the inner cooling air ring body (1) is fixedly connected with an inner cooling chimney (3), the bottom of the inner cooling air ring body (1) is fixedly connected with a plurality of air outlet pipes (4), the bottom of the inner cooling air ring body (1) is provided with an air inlet pipe (5) connected with the inner cooling air ring body (1) on one side of the plurality of air outlet pipes (4), and the side wall of the inner cooling air ring body (1) is provided with a plurality of air exhaust holes (6).

2. The double-duct inner cooling air ring for a film blowing mold according to claim 1, characterized in that: The number of the air outlet pipes (4) and the air inlet pipes (5) are the same and correspond to each other, and the number of the air outlet pipes (4) and the air inlet pipes (5) are not less than six and are evenly distributed.

3. The double-channel inner cooling air ring for a film blowing mold according to claim 1, characterized in that: The air outlet pipe (4) is located on the inner side of the annular partition plate (2), and the air inlet pipe (5) is located on the outer side of the annular partition plate (2).

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