TECHNICAL FIELD

The invention belongs to the field of textile performance testing, and relates to an automatic fabric folding device and detection method.

BACKGROUND TECHNOLOGY

The crease recovery property of fabrics is regarded as one of the key properties in fabric quality testing. The specified size samples are manual cut and folded into the pressing device. When a certain pressure time is reached, the samples are transferred to the measuring device artificially and the results of the crease recovery angle test are obtained by artificial reading. In the process of testing, the samples are repeatedly touched by human, which causes large errors in the test results. Although some of the existing testers for evaluating fabric crease recovery performance have realized the functions of automatic pressing and pressure relief, manual operation is still needed to make the sample form a bending and folding state. In the operation, it is unavoidable that the state of the fabric is affected by manual factors, especially the position where the creases will emerge and this will cause unstable and unreliable experimental results. In view of the above shortcomings, the present invention provides a novel fabric automatic precise folding method, greatly improving the automation extent of the fabric performance testing equipment and ensuring that the fabrics are not disturbed by human factors in the process of measuring the crease recovery performance.

SUMMARY OF THE INVENTION

The invention provides an automatic fabric folding device and detection method, which automatically folds the two sides of a flat fabric to produce creases to assess the crease recovery performance of the fabric.

The technical solution of the present invention is as follows:

The automatic fabric folding device comprises a rotating mechanism, an automatic folding mechanism and a crease generating mechanism. The automatic folding mechanism is located below the finger cylinder on one side of the rotating mechanism, and a second cylinder on the other side of the automatic folding mechanism is adjacent to a crease generating mechanism. Two sets of automatic fabric folding device are set symmetrically on the horizontal plane, which can simultaneously fold fabrics to improve efficiency.

The rotating mechanism comprises a first turntable, a first metal sheet, a first finger cylinder, a first rotating cylinder, a second rotating cylinder, a second finger cylinder and a second metal sheet.

The rotating arm is fixed above the first turntable. The two ends of the rotating arm are respectively fixed with the first rotating cylinder and the second rotating cylinder. The two rotating cylinders are centrally symmetrical with the rotating arm. The first turntable rotates to drive the two rotating cylinders to rotate. an output end of the first rotating cylinder is fixed with the first finger cylinder, and an output end of the second rotating cylinder is fixed with the second finger cylinder. The first rotating cylinder is adapted to rotate the first finger cylinder between a vertical and a horizontal orientation, and the second rotating cylinder is adapted to rotate the second finger cylinder between a vertical and a horizontal orientation.

The finger cylinder can clamp the sample on both sides of the metal sheet, and the metal sheet is in the middle of the folding sample to prevent the sample from boning. The rotating cylinder makes the sample clamped by the finger cylinder rotate 90°, forming a state that the crease is perpendicular to the horizontal plane. Thus, the test results are not affected by the weight of the sample when the recovery angle is tested. The turntable transports the sample from the automatic folding mechanism to the crease generating mechanism.

The automatic folding mechanism comprises a first servo motor, a first lifting platform, a first vacuum turning platform and a first sample positioning block.

The first servo motor and the first sample positioning block are fixed on the upper surface of the first lifting platform. The first sample positioning block is located at the output end of the first servo motor and below the first finger cylinder. The output end of the first servo motor is fixed with a first vacuum turning platform, and the other ends of the first and second vacuum turning platforms are fixed with a synchronous gear separately. The first and second turning platforms are driven by the first servo motor through the synchronous gears. The first and second vacuum turning platforms are horizontally fixed above the first sample positioning block, and the metal sheets are vertically fixed between them. The first vacuum turning platform is square block, with air suction holes on one side of the square block, and the air suction holes are connected with the air suction fan, and the sample is placed on the first vacuum turning platform. The suction holes absorb the two sides of the sample to make the two sides of the sample aligned during the turning process of the first vacuum turning platform to prepare for accurate folding of the sample.

The first lifting platform makes the sample placed on the surface of the first vacuum turning platform rise to the position where the first finger cylinder can clamp the sample. The vacuum turning platform can effectively adsorb both ends of the sample, thus forming the bending shape of the sample, and the sample positioning block plays the role of fixing the position of the sample.

The crease generating mechanism comprises the first pressing cylinder and the first electromagnetic support block. The first pressing cylinder and the first electromagnetic support block are fixed on the top of the crease bracket. The first pressing cylinder and the first electromagnetic support block are set correspondingly and at the level of the finger cylinder of the rotating mechanism. When the finger cylinder holds the metal sheet and rotates 90° vertically, the metal sheet is located in the gap between the first pressing cylinder and the first electromagnetic support block. Pressing cylinder is used to exert constant pressure on the sample. Electromagnetic support block is used to absorb the metal sheet, so that one side of the sample is clamped between the metal sheet and the electromagnetic support block, which plays the role of fixing the sample in the recovery testing process.

Furthermore, the vacuum turning platform has three parallel suction holes, which are located at the edge of the vacuum turning platform.

The detection method of automatic fabric folding device is as follows:

Step 1: Place the fabric sample on the surface of the first vacuum turning platform and open the measuring machine.

Step 2: The suction holes of the first vacuum turning platform absorb both ends of the sample.

Step 3: The first lifting platform rises, and the first servo motor drives the synchronous gear, which makes the first vacuum turning platform turn over and drives the sample to form a folding state. The first metal sheet is located between the samples.

Step 4: The first finger cylinder holds both sides of the sample folded together.

Step 5: The first vacuum turning platform closes the vacuum, the first servo motor drives the first vacuum turning platform to turn in reverse to restore the open state, and the first lifting platform descends.

Step 6: The first turntable rotates 180°, and the sample is held by the first finger cylinder and transported to the crease generating mechanism.

Step 7: The first rotating cylinder rotates 90°. The sample is placed between the first pressing cylinder and the first electromagnetic support block. The first electromagnetic support block is opened so that the first electromagnetic support block can absorb the first metal sheet. Then part of the sample is stably clamped on the crease generating mechanism.

Step 8: The first pressing cylinder is started to pressurize the sample. At the same time, the first finger cylinder is released to stop holding the sample.

Step 9: When the pressure time is reached, the first pressure cylinder is released, the first electromagnetic support block still absorbs the first metal sheet, the fabric sample is in the state of free recovery of creases, and the camera records the state of sample recovery process.

Step 10: When the fabric sample is restored freely for a period of time, the electromagnet of the first electromagnetic support block is released, and the first rotating cylinder rotates 90° to return to its initial state.

Step 11: When the first lifting platform descends, the next sample can be placed on the upper surface of the first vacuum turning platform. Repeat steps 2 to 10.

The beneficial effects of the present invention are as follows:

The present invention accurately controls the bending and folding of the fabric sample by the automatic control technology, and realizes the automatic detection of the fabric crease recovery process. By means of mechanical and numerical control technology, the parts to be measured are effectively prevented from interference by human factors, and the detection accuracy is improved.

