A label-free marking device, connecting with an external conveying device, wherein the external conveying device comprises a conveyor, a feeding device and a discharging device, and comprising:
- a frame;
- a disc-shaped conveying module, wherein the disc-shaped conveying module is connected with the feeding device and the discharging device respectively, and packaging bottles enter the disc-shaped conveying module from the feeding device, and return to the conveyor through the discharging device after completing label printing on the disc-shaped conveying module;
- a laser marking module, wherein the laser marking module comprises laser heads, the laser heads are distributed along circumference of the disc-shaped conveying module and arranged on the disc-shaped conveying module, so as to move with the disc-shaped conveying module and mark the packaging bottles at corresponding positions;
- a first driving module, wherein an output end portion of the first driving module is connected with the disc-shaped conveying module, so as to drive the disc-shaped conveying module to rotate;
- the disc-shaped conveying module comprises a first rotating shaft, a first cam disc, a pair of first fixing frames, a first active rotating disc, a first follower disc, first pressing mechanisms and storage trays;
- the first rotating shaft is connected to an output end portion of the first driving module;
- the first cam disc is sleeved on the first rotating shaft and does not rotate with the first rotating shaft, and an outer ring of the first cam disc is provided with a first cam track;
- the pair of first fixing frames are respectively arranged on both sides of the first cam disc and connected to the first cam disc, and are used to fix the first cam disc;
- the first follower disc and the first active disc are sequentially sleeved on the first rotating shaft and are able to rotate with the first rotating shaft;
- the first active disc is provided with storage trays for placing bottle bodies;
- the first follower disc is provided with first pressing mechanisms corresponding to the storage trays one by one;
- sides of the first pressing mechanism are provided with first pulleys which are slidably connected to the first cam disc through the first cam track and are able to move up and down while moving along circumference of the first cam disc, so as to press or loosen the bottle bodies;
- the laser marking module further comprises a second cam disc, lifting mechanisms, a second follower disc and laser head controllers;
- the second cam disc is fixedly connected to the first cam disc via connecting columns, and on an outer ring of the second cam disc is arranged a second cam track;
- the second follower disc is fixedly connected to the first follower disc through connecting columns, so as to move synchronously with the first follower disc;
- the lifting mechanisms respectively correspond to and are connected to the laser heads one by one, and second pulleys are arranged at sides of the lifting mechanisms, the second pulleys are slidably connected to the second cam disc through the second cam track, and are able to move up and down while moving along circumference of the second cam disc;
- the laser head controllers respectively correspond to the laser heads one by one and are arranged on the second follower disc;
- the lifting mechanisms comprise second sliding frames and pairs of second guide rods;
- the second sliding frames are sleeved on the pairs of second guide rods and are able to slide relative to the pairs of second guide rods;
- the second pulleys are arranged at sides of the second sliding frames and are able to drive the second sliding frames to move;
- the pairs of second guide rods are fixedly connected to the first follower disc;
- the lifting mechanisms further comprise second fixed plates and pairs of second springs;
- the second fixing plates are arranged at upper end portions of the pairs of second guide rods and are fixedly connected to the pairs of second guide rods;
- and
- the pairs of second springs are respectively arranged at two end portions of the second fixing plates, end portions of the second springs are connected to the second fixing plates, and another end portions thereof are connected to the second sliding frames.