One-way step-by-step stretching system for PET (Polyester) grating

Abstract

The utility model relates to a one-way step-by-step stretching system for a PET (Polyester) grid, which belongs to the technical field of geotechnical material processing and comprises a preheating oven, and the output end of the preheating oven is sequentially connected with a preheating area, a stretching area I and a stretching area II; a plurality of preheating rollers are arranged in the preheating area, are arranged in an up-down staggered manner and are in transmission connection with a preheating driving speed reducer; a plurality of stretching rollers A are arranged in the stretching area I, are staggered up and down, and are in transmission connection with a stretching driving speed reducer A; a plurality of stretching rollers B are arranged in the second stretching area, are arranged in an up-down staggered manner and are in transmission connection with a stretching driving speed reducer B; according to the utility model, the sheet can be stretched step by step, the stretching ratio is reduced, the stress concentration is reduced in the stretching process, and the sheet is stretched more uniformly and is not easy to break.

Description

Technical Field

[0001] This utility model relates to a unidirectional progressive stretching system for polyester PET grids, belonging to the field of geotechnical processing technology. Background Technology

[0002] Traditional unidirectional stretching systems for gratings are mostly processed using PP and PE raw materials. These materials have lower processing temperatures, better processing stability compared to PET, and simpler processing techniques. PET grating stretching is more sensitive to factors such as temperature, stretching speed, and cooling rate, requiring higher stretching temperatures and more demanding processing techniques and methods. Therefore, using traditional processes to stretch PET sheets easily leads to uneven stretching and sheet breakage. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a unidirectional progressive stretching system for polyester PET grid, which can avoid problems such as uneven stretching of PET sheets and sheet breakage.

[0004] The unidirectional progressive stretching system for polyester PET grids of this utility model includes a preheating oven, the output end of which is sequentially connected to a preheating zone, a stretching zone one, and a stretching zone two. The preheating oven is used to preheat and dry the sheet material. Multiple preheating rollers are arranged in a staggered pattern within the preheating zone, and the preheating rollers are connected to a preheating drive reducer. Multiple stretching rollers A are arranged in a staggered pattern within the stretching zone one, and the stretching rollers A are connected to a stretching drive reducer A. Multiple stretching rollers B are arranged in a staggered pattern within the stretching zone two, and the stretching rollers B are connected to a stretching drive reducer B.

[0005] The technical solution of this utility model is to provide a unidirectional progressive stretching system for polyester PET grids. A preheating oven is set up to preheat and dry the sheet. The sheet is continuously heated by the preheating roller in the preheating zone. Then, the sheet is progressively stretched by the stretching roller A in the stretching zone 1 and the stretching roller B in the stretching zone 2. This reduces the stretching ratio, reduces stress concentration during the stretching process, makes the stretching more uniform, and makes it less prone to breakage.

[0006] Preferably, the preheating oven is equipped with an electric heating box and a centrifugal fan. The centrifugal fan circulates hot air on both the top and bottom surfaces of the sheet to preheat and dry the sheet.

[0007] Preferably, the preheating roller, stretching roller A and stretching roller B are all provided with hot oil channels for continuously heating the sheet by introducing hot oil, so as to facilitate the stretching operation of the sheet.

[0008] Preferably, one end of each preheating roller is fixedly connected to a transmission gear, and the lower preheating roller is connected to the two adjacent upper preheating rollers via a transmission gear. The rotation direction of the lower preheating roller is opposite to that of the upper preheating roller.

[0009] Preferably, one end of each stretching roller A is fixedly connected to a transmission gear, and the lower stretching roller A is connected to the two adjacent upper stretching rollers A through a transmission gear. The rotation direction of the lower stretching roller A is opposite to that of the upper stretching roller A.

[0010] Preferably, one end of each stretching roller B is fixedly connected to a transmission gear, and the lower stretching roller B is connected to the two adjacent upper stretching rollers B through a transmission gear. The rotation direction of the lower stretching roller B is opposite to that of the upper stretching roller B.

[0011] Preferably, the temperature of the hot oil introduced into the preheating roller is higher than the heating temperature of the preheating oven, and the temperature of the hot oil introduced into stretching roller A and stretching roller B is higher than the temperature of the hot oil introduced into the preheating roller.

[0012] The advantages of this utility model compared with the prior art are:

[0013] The unidirectional progressive stretching system for polyester PET grids described in this utility model preheats and dries the sheet by setting up a preheating oven, continuously heating the sheet by the preheating roller in the preheating zone, and then progressively stretching the sheet by stretching roller A in stretching zone one and stretching roller B in stretching zone two, reducing the stretching ratio, reducing stress concentration during the stretching process, making the sheet stretching more uniform and less prone to breakage. Attached Figure Description

[0014] Figure 1 This is the front view of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model.

[0016] In the diagram: 1. Preheating oven; 11. Centrifugal fan; 12. Electric heating box; 2. Preheating zone; 21. Preheating drive reducer; 22. Transmission gear; 23. Preheating roller; 3. Stretching zone 1; 31. Stretching drive reducer A; 32. Stretching roller A; 4. Stretching zone 2; 41. Stretching drive reducer B; 42. Stretching roller B; 5. Sheet. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments.

[0018] However, the description of this utility model is only a structural or even functional description of the embodiments, and the scope of the present utility model is not limited by the embodiments described herein.

[0019] For example, multiple embodiments may have various modifications and forms, and it should be understood that the scope of this utility model includes equivalents that can realize the technical concept.

[0020] like Figures 1-2 As shown, this embodiment is achieved through the following technical solution: It includes a preheating oven 1, the output end of which is sequentially connected to a preheating zone 2, a stretching zone 1 3, and a stretching zone 2 4; the preheating oven 1 is used for preheating and drying the sheet material; the preheating zone 2 is provided with multiple preheating rollers 23, which are arranged alternately vertically, and the preheating rollers 23 are connected to a preheating drive reducer 21; the stretching zone 1 3 is provided with multiple stretching rollers A32, which are arranged alternately vertically, and the stretching rollers A32 are connected to a stretching drive reducer A31; the stretching zone 2 4 is provided with multiple stretching rollers B42, which are arranged alternately vertically, and the stretching rollers B42 are connected to a stretching drive reducer B41.

[0021] In this embodiment, the preheating oven 1 is equipped with an electric heating box 12 and a centrifugal fan 11. The centrifugal fan 11 circulates hot air on both sides of the sheet to preheat and dry the sheet. The preheating roller 23, stretching roller A32, and stretching roller B42 are all equipped with hot oil channels for continuously heating the sheet with hot oil to facilitate the stretching operation of the sheet.

[0022] Each preheating roller 23 has a transmission gear 22 fixedly connected to one end. The lower preheating roller is connected to its two adjacent upper preheating rollers via the transmission gear 22, and the rotation direction of the lower preheating roller is opposite to that of the upper preheating roller. Each stretching roller A32 has a transmission gear 22 fixedly connected to one end. The lower stretching roller A is connected to its two adjacent upper stretching rollers A via the transmission gear, and the rotation direction of the lower stretching roller A is opposite to that of the upper stretching roller A. Each stretching roller B42 has a transmission gear 22 fixedly connected to one end. The lower stretching roller B is connected to its two adjacent upper stretching rollers B via the transmission gear, and the rotation direction of the lower stretching roller B is opposite to that of the upper stretching roller B.

[0023] The temperature of the hot oil introduced into the preheating roller 23 is higher than the heating temperature of the preheating oven 1, and the temperature of the hot oil introduced into the stretching rollers A32 and B42 is higher than the temperature of the hot oil introduced into the preheating roller 23.

[0024] The working process of this utility model is as follows:

[0025] 1. The punched sheet 5 first enters the preheating oven 1, and the hot air is circulated on both the top and bottom sides of the sheet 5 by the centrifugal fan 11 to preheat and dry the sheet 5.

[0026] 2. Then the sheet 5 enters the preheating zone 2. The preheating drive reducer 21 drives the oil-heated preheating roller 23 to rotate. The sheet 5 is wrapped around the roller in an S-shape for secondary heating and conveying.

[0027] 3. Then the sheet 5 enters the stretching zone 3. The stretching drive reducer A31 drives the oil-heated stretching roller A32 to rotate. At the same time, the speed difference between the stretching drive reducer A31 and the preheating roller 23 is formed by the speed adjustment of the stretching drive reducer A31 to perform preliminary stretching on the sheet 5.

[0028] 4. The sheet 5 then enters the second stretching zone 4. The stretching drive reducer B41 drives the oil-heated stretching roller B42. The speed difference between the stretching drive reducer B41 and the stretching roller A32 is formed by the speed adjustment of the stretching drive reducer B41 to stretch the sheet a second time. The sheet is then shaped in the second stretching zone 4.

[0029] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A unidirectional progressive stretching system for polyester (PET) grids, characterized in that, The equipment includes a preheating oven (1), and the output end of the preheating oven (1) is connected in sequence to a preheating zone (2), a stretching zone 1 (3), and a stretching zone 2 (4). The preheating zone (2) is equipped with multiple preheating rollers (23), which are arranged alternately in the upper and lower parts. The preheating rollers (23) are connected to the preheating drive reducer (21). The stretching zone 1 (3) is equipped with multiple stretching rollers A (32), which are arranged alternately in the upper and lower parts. The stretching rollers A (32) are connected to the stretching drive reducer A (31). The stretching zone 2 (4) is equipped with multiple stretching rollers B (42), which are arranged alternately in the upper and lower parts. The stretching rollers B (42) are connected to the stretching drive reducer B (41).

2. The unidirectional progressive stretching system for polyester PET grids according to claim 1, characterized in that, The preheating oven (1) is equipped with an electric heating box (12) and a centrifugal fan (11).

3. The unidirectional progressive stretching system for polyester PET grids according to claim 1, characterized in that, The preheating roller (23), stretching roller A (32) and stretching roller B (42) are all provided with hot oil channels.

4. The unidirectional progressive stretching system for polyester PET grids according to claim 3, characterized in that, One end of each of the preheating roller (23), stretching roller A (32), and stretching roller B (42) is fixedly connected to a transmission gear (22); The lower preheating roller is connected to the two adjacent upper preheating rollers via a transmission gear, and the rotation direction of the lower preheating roller is opposite to that of the upper preheating roller. The lower stretching roller A is connected to the two adjacent upper stretching rollers A via a transmission gear, and the rotation direction of the lower stretching roller A is opposite to that of the upper stretching roller A. The lower stretching roller B is connected to the two adjacent upper stretching rollers B via a transmission gear. The rotation direction of the lower stretching roller B is opposite to that of the upper stretching roller B.

5. The unidirectional progressive stretching system for polyester PET grids according to claim 4, characterized in that, The temperature of the hot oil introduced into the preheating roller (23) is higher than the heating temperature of the preheating oven (1), and the temperature of the hot oil introduced into the stretching roller A (32) and stretching roller B (42) is higher than the temperature of the hot oil introduced into the preheating roller (23).

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