Adjustment instructions for the claw mechanism of the front helping machine: Before arranging the claws, the position of one claw must be determined first, and then the claws should be arranged according to the produced shoe shape based on one claw. The position of one claw depends on the sweeping blade, as follows:
1. The relationship between claws and sweeping knives:
When the big seat descends to the bottom and the sweeper returns to the origin, the inner edge of the first claw should be about 3-5mm away from the front section of the connection of the sweeper. The adjustment step is to rotate the claw to adjust the screw rod forward and backward, so that the front edge of the claw is aligned with the front edge of the claw fixing seat, and then adjust the nut at the front and rear piston rod ends of the big seat based on this position, so that the distance between the sweeper and the first claw meets the requirements. The height of all claws must be about 3mm away from the bottom surface of the sweeper (the height can be adjusted by screws), Adjust the height of the first claw by first placing the piston rod positioning screw below the upper seat of the first claw, then turning the lifting switch of the first claw to the left to lower it by about 5mm, and then locking the screw.
2. The relationship between the first claw and the inner and outer support platforms:
When the outer support platform rises, the distance between the front edge and the inner edge of the first claw is about 8-10mm (if it is a glue injection model, it depends on the position of the pre adhesive at the midsole). The arc center line of the first claw must be aligned with the center line of the inner support platform (the inner support platform is aligned with the center point of the connection part of the wiper blade). The distance between the outer support platform and the claw can be set by using the fore and aft adjustment handle of the support platform.
3. Claw arrangement:
1) Determine the type of shoe to be produced, and select claws with similar arcs according to the shape of the shoe last. Before arranging the claws, activate the rocker switch to align the hydraulic cylinder of the claw plate with the contour, located at the midpoint of its stroke. The purpose is to achieve the maximum bi-directional adjustment range after the claws are arranged, and to adjust the size and shape of the claw plate and claws in conjunction with the shoe last on the production line.
2) If the time for the claw to release the shoe upper is too slow during the tying process of the front lasting machine, the sweeping knife may break the shoe upper or even bend the claw. The 2-5 claws of this mechanism allow for a small angle of forward tilt. Therefore, when the claws are subjected to a large forward tilt pressure, the claws will tilt forward to absorb excessive force, thereby avoiding shoe upper damage or claw structure bending. Before arranging the claws, the forward tilt angle must be adjusted first, When rotating the "claw tilt adjustment screw" clockwise, the claw will move forward to shorten the distance of the claw tilting forward. Conversely, when rotating the "claw tilt adjustment screw" counterclockwise, the claw will move backward to increase the distance of the claw tilting forward. Generally speaking, the larger the distance the claw tilts forward, the greater the allowable error, which means it will not damage the shoe upper and claw mechanism. However, the premise is that when the claw tilts forward, it cannot touch the external support platform or rubber plate. It is recommended that the user adjust the distance of the claw tilts forward to 8mm, but the left and right claws cannot tilt forward to avoid collision with the first claw.
3) After adjusting the position of the claw disc and the forward tilt distance of the claws, the claw arrangement operation can be started. In the same batch of shoe types that are ready for production, the middle shoe toe is taken as the model for claw arrangement, and the shoe last is placed on the inner support platform and straightened (the centerline of the shoe last is parallel to the imaginary center line of the machine). The center point of the shoe tip is aligned with the center of a claw, and then the claws will be arranged in sequence according to the contour of the shoe last, The right claw is arranged according to the outer waist of the right shoe last, while the left claw is arranged according to the contour of the outer waist of the left shoe last. When adjusting the claw arrangement, attention should be paid to the distance between the two claws to avoid contact