Recently, Guangdong Jinming Precision Machinery Co., Ltd. (referred to as "Jinming Precision Machinery") announced that the company has recently obtained six national patents and received the relevant patent certificates issued by the National Intellectual Property Administration.

The six patents include a plastic pellet feeding mechanism with a material return function, an automatic paper core pushing device, a reel transfer mechanism for roll changing in film winding, an automatic roll changing device for the surface winding production line of films, an automatic unloading and core changing device for the film production line, and a cooling air ring for blown film equipment that can adjust the inner diameter.

Plastic pellet feeding mechanism with material return function

A plastic particle feeding mechanism with a material return function, including a hopper, a material barrel, and a fan, where the fan is connected to a horizontal air duct; it also includes a main conveying pipe, an upstream section of a suction pipe, a downstream section of a suction pipe, an upstream section of a return pipe, and a three-way switching mechanism. The three-way switching mechanism consists of a first channel, a second channel, and a third channel that are interconnected, with the second channel equipped with a second channel valve and the third channel equipped with a third channel valve. One end of the main conveying pipe is connected to the first channel of the three-way switching mechanism; the upstream end of the downstream section of the suction pipe is connected to the second channel of the three-way switching mechanism, and the downstream end of the upstream section of the return pipe is connected to the third channel of the three-way switching mechanism; the fan is a bidirectional fan; there is also a downstream section of the return pipe, with the second end of the main conveying pipe simultaneously communicating with the upper end of the downstream section of the return pipe and the upper end of the upstream section of the suction pipe. This invention can perform both suction and return of materials without the need to simultaneously set up suction pipes and exhaust pipes between the production area and the storage area.

Paper tube automatic pushing device

An automatic push device for paper core tubes includes a fixed support, a sliding block, a first guide rail, a push plate, and a V-shaped groove, with the push plate fixedly connected to the sliding block. It is also equipped with a sliding block driving mechanism that drives the sliding block to move longitudinally along the first guide rail. The sliding block driving mechanism includes a cylinder, a sliding seat, a second guide rail, a wire rope transmission pair, and a chain transmission pair. The sliding seat is mounted on the second guide rail, and the piston rod of the cylinder is drivingly connected to the sliding seat. The chain transmission pair includes two sprockets at the front and rear and a chain that surrounds the two sprockets, with the sliding block fixedly connected to a link of the chain. The wire rope transmission pair includes a wire rope, two front and rear guide wheels, and three tensioning wheels located at the front, middle, and rear, with the rotation axes of the three tensioning wheels fixedly mounted on the fixed support. The rotation axes of the two front and rear guide wheels and the two front and rear sprockets are also mounted on the sliding seat and move longitudinally with the sliding seat. This invention does not cause deformation of the paper core tube due to compression, and additionally, the maximum pushing distance of the cylinder can reach twice the stroke of the cylinder's piston rod.

Reel transfer mechanism for film winding and unwinding

A winding shaft transfer mechanism for film winding and unwinding includes a frame, on which a surface friction roller is installed. Above both ends of the surface friction roller, a storage shaft support for placing a spare winding shaft is provided, and the storage shaft support is vertically movable on the frame. Each storage shaft support forms an upward-opening first fork. On both lateral sides of the surface friction roller, rotating brackets are also respectively provided, with each side's rotating bracket comprising two clamping arms. The rear clamping arm is hinged to the rotating bracket via a rear clamping arm pivot, forming a second fork between the two clamping arms. The rear clamping arm is also fixedly connected to a limiting block, which rotates synchronously with the rear clamping arm around the rear clamping arm pivot, and a roller is installed at the end of the limiting block. An arc-shaped track is also fixedly installed on the frame. The rear clamping arm of this utility model can effectively prevent the spare winding shaft located above the surface friction roller from accidentally rolling backward and downward, while the rear clamping arm does not hinder the downward rotation of the rotating bracket.

Automatic roll change device for thin film surface winding production line

An automatic roll changing device for a thin film surface winding production line includes a frame, on which a friction roller is installed. Above both ends of the friction roller, there are storage shaft supports for placing spare winding shafts, which are installed on the frame to move vertically. The storage shaft support forms an upward-opening first fork. On both lateral sides of the friction roller, rotating brackets are installed, each side's rotating bracket includes two clamping arms, forming a second fork between the two clamping arms. A cutter for cutting the film transversely and a cutter driving mechanism for driving the cutter to move transversely are also installed on the frame. Between the left and right rotating brackets, a first supporting film guide roller and a second supporting film guide roller are set up, with the extension direction of the two supporting film guide rollers parallel to the friction roller, and the two supporting film guide rollers rotate along with the left and right rotating brackets. This utility model is suitable for roll changing in both top winding and bottom winding surface winding methods.

Automatic Unwinding and Core Changing Device for Film Production Line

An automatic reel unloading and core changing device for a film production line includes an organic frame, on which a winding station and two lateral transfer supports are set up, as well as a first cylinder driving the longitudinal movement of the transfer supports. A transverse guide rail extending horizontally is located in front of the longitudinal clamping track, on which a film-carrying trolley capable of moving laterally is installed. The frame also has a fixed vertical guide rail, on which a core pulling component is mounted. The core pulling component includes a component bracket, a lower clamping block, an upper clamping block, a support block, a cam, a swing rod, a third cylinder, and a fourth cylinder. The component bracket is installed to slide vertically on the vertical guide rail and is equipped with a second cylinder that drives the component bracket to move up and down along the vertical guide rail. The third and fourth cylinders are mounted on the component bracket. The upper clamping block is connected to the first end of the swing rod, and the second end of the swing rod is driven by the third cylinder. The cam is driven to rotate by the fourth cylinder. This utility model can automatically realize reel unloading and core changing while occupying a small workshop area.

Cooling wind ring for blown film equipment with adjustable inner diameter

A blowing film device cooling air ring that can adjust the inner diameter includes an annular main air duct. On the inner side of the annular main air duct, there are two layers of circular air guiding plates stacked vertically. Above the upper circular air guiding plate, there is a set of regulating components, and below the lower circular air guiding plate, there is also a set of regulating components. Each set of regulating components includes a circular adjustment ring and multiple elongated curved plates. Each pair of adjacent curved plates partially overlap to form an overlapping arrangement, and all the curved plates combined form a curved plate assembly. Both ends of each curved plate are equipped with a first convex pin and a second convex pin. The circular adjustment ring is uniformly arranged with multiple circular pin holes along the circumference, and the first convex pin of each curved plate is inserted into a corresponding circular pin hole of the circular adjustment ring. The circular air guiding plate is uniformly arranged with multiple elongated holes along the circumference, and the second convex pin of each curved plate is inserted into an elongated hole of the circular air guiding plate. This utility model can adjust and change the inner diameter to accommodate the varying needs of the film bubble diameter.

Jinming Precision Machinery stated that the six patents mentioned above are all independently developed by the company. The technologies involved are related to the company's main technologies and have been applied to existing products. The acquisition and application of these patents fully demonstrate the company's strength in independent research and development and technological innovation, which is beneficial for further improving the intellectual property protection system, forming a continuous innovation mechanism, maintaining a leading technological position, and enhancing the company's core competitiveness and brand influence. In the future, the company will leverage its research and development advantages, continuously improve its R&D capabilities, and actively promote the "Smart Jinming" strategy to create benefits for shareholders.