CN-224224513-U - Unidirectional step-by-step stretching system of polyester PET (polyethylene terephthalate) grille

CN224224513UCN 224224513 UCN224224513 UCN 224224513UCN-224224513-U

Abstract

The utility model relates to a unidirectional step-by-step stretching system of a polyester PET (polyethylene terephthalate) grid, which belongs to the technical field of geotechnical material processing and comprises a preheating oven, wherein the output end of the preheating oven is sequentially connected with a preheating area, a first stretching area and a second stretching area, a plurality of preheating rollers are arranged in the preheating area and are in transmission connection with a preheating driving speed reducer, a plurality of stretching rollers A are arranged in the first stretching area and are in transmission connection with the stretching driving speed reducer A, a plurality of stretching rollers B are arranged in the second stretching area and are in transmission connection with the stretching driving speed reducer B, the stretching rollers B are in up-down staggered arrangement, and the unidirectional step-by-step stretching system can stretch a sheet step by step, reduce the stretching ratio, reduce stress concentration in the stretching process, and enable the sheet to be more uniform in stretching and not easy to break.

Inventors

ZHANG JIANQUN
LI YONG
TANG XIUFENG
XIA GUOZHENG

Assignees

山东通佳机械有限公司

Dates

Publication Date: 20260512
Application Date: 20250728

Claims (5)

1. A unidirectional step-by-step stretching system of a polyester PET grid is characterized by comprising a preheating oven (1), wherein the output end of the preheating oven (1) is sequentially connected with a preheating zone (2), a stretching first zone (3) and a stretching second zone (4), a plurality of preheating rollers (23) are arranged in the preheating zone (2), the preheating rollers (23) are arranged in a vertically staggered mode, the preheating rollers (23) are in transmission connection with a preheating drive speed reducer (21), a plurality of stretching rollers A (32) are arranged in the stretching first zone (3), the stretching rollers A (32) are arranged in a vertically staggered mode, the stretching rollers A (32) are in transmission connection with a stretching drive speed reducer A (31), a plurality of stretching rollers B (42) are arranged in the stretching second zone (4), the stretching rollers B (42) are arranged in a vertically staggered mode, and the stretching rollers B (42) are in transmission connection with a stretching drive speed reducer B (41).
2. The unidirectional progressive stretching system of the polyester PET grid according to claim 1, wherein the preheating oven (1) is provided with an electric heating box (12) and a centrifugal fan (11).
3. The unidirectional progressive stretching system of the polyester PET grid according to claim 1, wherein the preheating roller (23), the stretching roller a (32) and the stretching roller B (42) are respectively provided with a hot oil channel.
4. The unidirectional progressive stretching system of the polyester PET grid according to claim 3, wherein one end of each of the preheating roller (23), the stretching roller A (32) and the stretching roller B (42) is fixedly connected with a transmission gear (22); The lower preheating roller is in transmission connection with two adjacent upper preheating rollers through 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 in transmission connection with two adjacent upper stretching rollers A through 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 in transmission connection with two adjacent upper stretching rollers B through a transmission gear, and 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 of the polyester PET grid of claim 4, wherein 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 the stretching roller B (42) is higher than the temperature of the hot oil introduced into the preheating roller (23).

Description

Unidirectional step-by-step stretching system of polyester PET (polyethylene terephthalate) grille Technical Field The utility model relates to a unidirectional step-by-step stretching system of a polyester PET (polyethylene terephthalate) grid, and belongs to the technical field of geotechnical material processing. Background The traditional grille unidirectional stretching system is used for processing the PP and PE raw materials in multiple ways, the processing temperature is low, the processing stability is better than that of PET, and the processing technology is simpler. Stretching of PET grids is sensitive to factors such as temperature, stretching speed and cooling speed, and requires higher stretching temperature and higher requirements on processing technology and method. Therefore, stretching of PET sheets by conventional processes tends to cause problems such as uneven stretching, sheet breakage, and the like. Disclosure of utility model According to the defects in the prior art, the technical problem to be solved by the utility model is to provide the unidirectional step-by-step stretching system for the PET grille, so that the problems of uneven stretching of PET sheets, sheet breakage and the like can be avoided. The unidirectional step-by-step stretching system of the PET grating comprises a preheating oven, wherein the output end of the preheating oven is sequentially connected with a preheating area, a first stretching area and a second stretching area, the preheating oven is used for preheating and drying a sheet, a plurality of preheating rollers are arranged in the preheating area and are in up-and-down staggered arrangement, the preheating rollers are in transmission connection with a preheating driving speed reducer, a plurality of stretching rollers A are arranged in the first stretching area and are in up-and-down staggered arrangement, the stretching rollers A are in transmission connection with the stretching driving speed reducer A, a plurality of stretching rollers B are arranged in the second stretching area and are in up-and-down staggered arrangement, and the stretching rollers B are in transmission connection with the stretching driving speed reducer B. According to the technical scheme, the unidirectional step-by-step stretching system for the PET grating is provided, a preheating oven is arranged for preheating and drying the sheet, the sheet is continuously heated through a preheating roller in a preheating area, and then the sheet is stretched step by step through a stretching roller A in a stretching first area and a stretching roller B in a stretching second area, so that the stretching ratio is reduced, stress concentration is reduced in the stretching process, stretching is more uniform, and breakage is not easy to occur. Preferably, the preheating oven is provided with an electric heating box and a centrifugal fan, hot air is circulated on the upper surface and the lower surface of the sheet through the centrifugal fan, and the sheet is preheated and dried. Preferably, the preheating roller, the stretching roller A and the stretching roller B are respectively provided with a hot oil channel for introducing hot oil to continuously heat the sheet so as to facilitate the stretching operation of the sheet. Preferably, one end of each preheating roller is fixedly connected with a transmission gear, the lower preheating roller is connected with two adjacent upper preheating rollers through the transmission gear, and the rotation direction of the lower preheating roller is opposite to that of the upper preheating roller. Preferably, one end of each stretching roller A is fixedly connected with a transmission gear, the lower stretching roller A is in transmission connection with two adjacent upper stretching rollers A through the transmission gear, and the rotation direction of the lower stretching roller A is opposite to that of the upper stretching roller A. Preferably, one end of each stretching roller B is fixedly connected with a transmission gear, the lower stretching roller B is in transmission connection with two adjacent upper stretching rollers B through the transmission gear, and the rotation direction of the lower stretching roller B is opposite to that of the upper stretching roller B. 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 the stretching roller A and the stretching roller B is higher than the temperature of the hot oil introduced into the preheating roller. Compared with the prior art, the utility model has the following beneficial effects: According to the unidirectional step-by-step stretching system for the PET grating, the preheating oven is arranged to preheat and dry the sheet, the preheating roller in the preheating area is used for continuously heating the sheet, and the stretching roller A in the f