The main components of a high-speed blister packaging machine include the machine body, aluminum foil support, blister heater, blister mechanism, feeder, PVC support, heat sealing mesh, stepping mechanism, transmission mechanism, punching mechanism, batch numbering mechanism, and electrical control box.
1. Machine Body: The machine body mainly consists of a base and wall panels, forming the main body of the machine and supporting all other components.
2. Aluminum-Plastic Roll: This includes two parts: an aluminum foil roll and a plastic sheet roll. The roll mainly consists of a cylinder, inner and outer stators, brake rings, and adjusting nuts. The cylinder is supported at both ends by rolling bearings on a support shaft, forming the rotating part of the roll. When the plastic film or aluminum foil is pulled, the roll material on the roll rotates freely. The stators, divided into inner and outer stators, slide on the outer cylindrical surface of the cylinder and are fixed at any position on the cylinder by fixing screws, used to install and fix roll materials of different widths. The brake ring is fitted onto the outer cylindrical surface of the inner end of the drum and fixed to the support plate. It forms the stationary part of the drum and is used to brake the drum. Tightening or loosening the four adjusting screws on the outer circumference of the brake ring increases or decreases the braking force on the drum, ensuring the traction film or aluminum foil receives the necessary tension. The adjusting nut is screwed onto the support shaft and fitted onto the inner cylindrical surface of the outer end of the drum, connected to the drum body by a bearing. Rotating the adjusting nut while the drum rotates allows for axial movement of the drum, adjusting the lateral position of the material. The support shaft is fixed to the support plate, which is fixed to the machine body, forming the main support structure for the drum.
3. Vacuum Forming Heater: The vacuum forming heater mainly consists of an arc-shaped heating box, eight far-infrared tubes, a support shaft, and a positioner. The upper end of the arc-shaped heating box is hinged to the support shaft and can swing around the shaft. During operation, it approaches the vacuum forming mold to radiate heat onto the material film; when not in operation, it swings away from the vacuum forming mold. The far-infrared tube, installed inside the heating box, is the heating element of this machine. The heat output is regulated by adjusting the voltage across the tube's electrodes using an electronic voltage regulator, ensuring the film reaches the necessary softening temperature. A support shaft, fixed to the machine body, supports the heating box. The positioner, consisting of a spring rod and a stop block, is installed on both the heating box and the machine body to determine the heating box's working position.
4. Bubble Molding Roller: A key component of this machine, it works in conjunction with the blister heater and heat-sealing roller to complete blister forming and heat-sealing processes. This component mainly consists of the blister mold, mold shaft, crescent-shaped valve plate, and vacuum and cooling systems.
5. Feeder: Primarily composed of feed material, feed trough, disc brush, roller brush, and DC motor. The feed material is used to store the medicine. The gate is opened, and the medicine automatically enters the feed trough. Then, three disc brushes rotating around a vertical axis brush the medicine into the formed blister pack. The three disc brushes rotate in a planetary trajectory to improve the filling rate of the feeder. A roller brush rotates clockwise around a horizontal axis and is positioned at the feeder outlet to brush any medicine on the film that failed to enter the blister pack into the blister pack or back into the feeder.
6. Heat-sealing anilox roller: The heat-sealing anilox roller works in conjunction with the bubble-absorbing roller mold to complete the heat-sealing of the film and aluminum foil. The heat-sealing anilox roller mainly consists of an anilox roller compression spring, a clutch device, and a support frame. The anilox roller body contains six heating tubes. During operation, the anilox roller is heated, which then melts the hot melt adhesive on the surface of the aluminum foil entering the heat-sealing process. The square bearings at both ends of the anilox roller are located in the slide grooves of the support frame, and the compression springs press the anilox roller. During operation, the anilox roller is brought close to the bubble-absorbing roller mold, allowing the film entering the heat-sealing process to achieve a heat-sealing seal with the heated aluminum foil. The clutch mechanism includes a cam and a shift fork. The cam rotates counter-clockwise, causing the square bearing to shift to the right via the shift fork, compressing the pressure spring in the opposite direction. This causes the anilox roller to separate from the bubble-absorbing mold. When no plastic film or aluminum foil enters, or when they do not enter the heat-sealing process simultaneously, the anilox roller and the bubble-absorbing mold must avoid contact; otherwise, both may be damaged.
7. Batch Number Device: The batch number is set inside the die. A long rectangular hole is located above the die cavity, into which a steel type holder is inserted. The steel type is connected as one unit by the type holder, and the outer end face of the type holder is pressed down by a pressure plate. Adjusting screws on the pressure plate are used to adjust the printing pressure of the batch number. Two adjusting screws above the die cavity are used to lock the steel type, and a spring is used to reset the steel type. To replace the batch number steel type, loosen the two Allen screws on the pressure plate, remove the type holder, replace the steel type, and reinstall the pressure plate.
8. Stepping Mechanism: This mechanism is the intermittent feed mechanism for the blanking process. It consists of an intermittent motion mechanism and a stepping roller, using a grooved wheel to convert the continuous motion of the transmission mechanism into intermittent motion. The surface of the stepping roller has bubble grooves, which connect with the plastic bubble strip to pull it. The movement of the stepping roller and the die must be strictly coordinated; the stepping roller must perform the feed motion during the die's return stroke. When the movements are not coordinated, first loosen the gear support plate of the intermittent motion mechanism (in the transmission box), swing the gear support plate to disengage the gears, and then adjust the feed time.
9. Transmission Mechanism: This mechanism includes a main motor, a tower wheel gearbox, a cycloidal pinwheel reducer, and transmission gears. The main motor transmits power to the bubble-absorbing die, the stepping mechanism, and the blanking mechanism through gear transmission.
10. Punching Mechanism: This mechanism punches plastic bubble wrap into plate-shaped packaging products. It mainly consists of a crank mechanism, a middle template (punch), a mold cavity, and blades. The crank mechanism enables the reciprocating motion of the middle template, and the middle template and mold cavity punch the bubble wrap into plates. The blades are installed on the lower side of the middle template and cut off the waste edges of the bubble wrap as the middle template moves.
