129results about "Leather stretching/tensioning" patented technology

The invention discloses a leather stretching and leveling device for leather product production and relates to the technical field of leather processing. The leather stretching and leveling device comprises a supporting rack, a leveling table for supporting leather is fixedly mounted on the supporting rack, two clamping mechanisms for clamping leather are symmetrically arranged on two sides of theleveling table, a lead screw I and a lead screw II which are coaxially fixed, opposite in thread rotating direction, are horizontally arranged in the supporting rack, thread bushing blocks in transmission connection to the clamping mechanisms are arranged on the lead screw I and the lead screw II in a threaded connecting sleeving manner, and the lower end of a leaning rod is higher than the bottom surface of a pressure plate. The pressure plate moves downward to compress the leather to the leveling table and the clamping mechanisms are driven by a lifting rack to pull the leather downward, sothat the leather supported by the leveling table is stretched and leveled effectively. A compression roller rolls the leather toward two sides in the process that the pressure plate moves downward, so that the leveling effect of the surface of the leather is improved greatly and the leather leveling efficiency is high.

The invention relates to the field of leather processing and discloses an automatic leather tightening device. The automatic leather tightening device comprises a leather tightening moving component, a leather edge position identifying component, a leather pressing assembly and a leather horizontal moving and positioning component. The leather horizontal moving and positioning component is mounted on a rack and is guided through a guide rail. The leather edge position identifying component is arranged across the rack. The leather pressing assembly is composed of a power-losing electromagnet, clamping iron and double-arm mechanical hands. By the adoption of the automatic leather tightening device, it is guaranteed that the leather can be tightened and also can be conveyed to the next working unit. Compared with the prior art, the automatic leather tightening device has the beneficial effects that fast, uniform and automatic tightening of the leather is achieved, the labor cost is saved, and the leather processing quality is improved.

A pelt drying assembly having a pelt board used in the drying of the leather side of a pelt which, in use, is applied to, stretched and secured on the distension element in the stretched position during drying, and a sleeve/bag made of fat and moisture absorbing material for covering the pelt secured in the stretched position by having been drawn over the fur side of the pelt so as to press the pelt against a holding area of the distension element. The sleeve/bag is tubular for drawing onto the pelt board from a pointed end thereof until it covers at least a part of the holding area on the distension element, and has a length equal to at least 1/3, preferably 1/2, of the length of the holding area of the distension element.

The invention discloses a leather traction device for garment manufacturing. The leather traction device comprising a base; a first supporting plate and a second supporting plate are fixed to the two sides of the upper surface of the base correspondingly; a first rotating shaft is arranged between the tops of the first supporting plate and the second supporting plate; lead screws are symmetrically arranged on the two sides of the first rotating shaft, and supporting blocks are movably mounted on the two lead screws correspondingly; supporting rods are arranged at the tops of the supporting blocks; traction plates are arranged at the tops of the supporting rods, and leather is arranged between the two traction plates; a first mounting plate and a second mounting plate are fixedly mounted on the two sides of the upper surface of the base; and a driving motor is fixed to the side, close to the second supporting plate, of the top of the first mounting plate. In the leather traction device, the leather can be made to flatly transited into the next step of processing working procedure, leather of different sizes can be subjected to traction, the time is saved, the continuity of the device is high, the working efficiency is effectively improved, and the device is simple in structure, novel in design and worth popularizing.

The invention relates to a fur stretching device. The fur stretching device comprises a supporting table, a clamping assembly, nail plates and a positioning piece, the supporting table is placed on the ground, two sliding rails are arranged on the two sides of the upper surface of the supporting table, the clamping assembly is arranged on the supporting table and located between the two sliding rails, the clamping assembly comprises clamping blocks, the clamping blocks are in sliding connection with the sliding rails, the two nail plates are provided and are horizontally placed on the slidingrails, fur is fixed on the nail plates, the side surfaces of the sides, close to each other, of the nail plates are arranged as arc surfaces, the clamping blocks can push the two nail plates to move towards each other, so that the connecting portion of the nail plates is arched upwards to stretch the fur, the two nail plates form a V-shaped structure, an opening faces downwards, the positioning piece is arranged at the opening of the V-shaped structure formed by the two nail plates, and the positioning piece connects the lower ends of the two nail plates to define the positions of the two nailplates. According to the fur stretching device, the fur can be stretched, moreover, the fur can be kept in a stable tension state in a relatively long period of time, and the problem of looseness isnot prone to occurrence.

A pelt board is disclosed for stretching and drying of tubular pelts, the pelt board having a tip end (13) from which the pelt is drawn onto the pelt board and a foot end (11), the pelt board comprising two broad elongated side surfaces (14, 15), wherein the pelt board comprises expansion means (3, 6) defining a narrow elongated side surface extending between side edges (4, 5, 7, 8) of the two broad elongated side surfaces (14, 15), and activation means (9) for selectively moving the expansion means (3, 6) to an expanded position and locking the expansion means (3, 6) in the expanded position, or unlocking the expansion means (3, 6) so that the expansion means (3, 6) are movable to a non-expanded position in which the outer cross-sectional circumference of the pelt board is reduced as compared to the expanded position.

A method, a system and a pelt board for the drying of the leather side of pelts from furred animals, in which the pelt board is a hollow distension element, the surface of which has an open structure. The the leather side is dried by changing the air within the distension element. The distension element is is lockable in a position in which it has a first circumference, and can also assume a position or be force controlled to a position in which it has a circumference which is smaller than the first, which results in a considerably easier removal of the pelt from the pelt board. A quicker, more uniform and more effective drying of the pelts is achieved, so that “black spots” on the leather side are avoided, and the pelt is fixed in its stretched position on the pelt board without the use of clips/staples.

The present invention relates to a method and an apparatus for stretching a pelt on a pelt board, by determining a length of the pelt and adjusting the stretch force in accordance with the determined length. In particular, the length may be determined prior to stretching of the pelt, or the length may be determined after the primary stretching of the pelt stretching the pelt, where after the stretching force is reduced before securing the pelt to the pelt board.

The invention discloses a production method of shrunk grain leather. According to the production method disclosed by the invention, a whole skinned animal skin material is used as a raw material, water immersion is carried out, fleshing operation can be respectively carried out after each immersion, and unhairing and swelling can be carried out after second immersion and before the fleshing operation; hide fiber is opened as possible starting from blue skin, big neutralization is adopted during a retanning stage, moderate filling is carried out, the using amount of vegetable tannin is increased, the loose degree of the hide fiber is enlarged as far as possible by a wet toggling plate, crust is subjected to re-embossing, rewetting can be carried out after patterns are sized through millingby a drum, temperature-controlled and humidity-controlled milling can be carried out by using a temperature-controlled stainless steel drum, the humidity of the crust is controlled by utilizing an alternate cooling and heating method, and leather patterns are shrunk, so that uniform and consistent shrunk grain leather can be produced.

A work table for an automatic machine for cutting leathers and the like, includes a plurality of holes opening outwards and communicating with a vacuum source, to make portions of leathers to adhere to the active surface (3) of the work table (1). The work table (1) includes a central body (1a), supported by a fixed structure (2). At least one lateral portion (1h, 1j), connected to the fixed structure (2), is moved by first motion means (10h, 10j) between at least one work configuration (K1), in which its active surface (3h, 3j) is aligned with the active surface (3a) of the central body (1a), to define the active surface (3) of the work table (1), and a rest configuration (K2) of reduced dimension, in which the active surfaces (3a, 3h, 3j) of the central body (1a) and the lateral portion (1h, 1j) are arranged at an angle with respect to each other.

The invention discloses a device for repairing holes in a surface of a leather made sofa. The device comprises a repairer box body. A working cavity opened downward is formed in the lower end surfaceof the repairer box body, two repair mechanisms are symmetrically arranged left and right in the working chamber, each repair mechanism comprises a supporting plate capable of moving left and right, an input shaft is rotatably arranged on the front end surface of the supporting plate, six rotating rods are uniformly and fixedly arranged on the input shaft, and repair wheels, the lower ends of which penetrate the lower end wall of the working chamber, are arranged on the lower sides of the rotating rods. For the characteristics of a leather product, leather is softened and stretched by way of extrusion to the center by the two wheels, so that the sizes of holes in the surface of the leather made sofa are reduced, the leather is softened under the circumstance of damaging the physical property of the leather to a less extent, so that the leather is fully repaired subsequently. The distance between the two wheels can be adjusted according to the sizes of the holes in the surface of the leather made sofa, so that the best repair effect is achieved.

A pelt board (11) is disclosed for stretching and drying of tubular pelts (5), the pelt board (11) having a tip end (4) from which the pelt is drawn onto the pelt board (11) and a foot end (2), wherein the pelt board (11) has a lower part (8) nearest the foot end (2) where the outer cross-sectional circumference of the pelt board (11) is substantially constant and an upper part (9) between the lower part (8) and the tip end (4), where the outer cross-sectional circumference of the upper part (9) gradually decreases towards the tip end (4), wherein the longitudinal extent (L1) of the lower part (8) is in the range of 36 to 50 cm, more preferably in the range of 40 to 45 cm. Furthermore is disclosed an extension piece for connecting with a standard pelt board and fat-absorbing inner bags (13, 19) for use with the pelt board (11).

The invention relates to the technical field of stretcher equipment, and discloses a cow leather stretcher. The cow leather stretcher comprises a bottom plate, wherein the top of the bottom plate is sequentially and fixedly connected with a right stand column and a left stand column from right to left, a downward pulling device is arranged on one side of the left stand column, the downward pullingdevice comprises a main motor, an output shaft of the main motor is fixedly connected with a main rotating shaft, a conical gear is arranged at the top of the main rotating shaft, and a driving rod is arranged on one side of the conical gear. According to the cow leather stretcher, the downward pulling device, a pull plate and a hook are arranged, so that the main motor is used for driving the driving rod to rotate, and then a first rotating rod is rotated; a second rotating rod is driven to move up and down under the action of a movable rod through rotation of the first rotating rod, then the pull plate on one side of a fixing block is driven to move up and down in a sliding groove so as to stretch a cow leather ring between the pull plate and the hook, and the action force on the lowerpart of the cow leather ring is uniform, so that the purpose of up-and-down reciprocating stretching is achieved; and mechanical production is achieved, so that the production efficiency is greatly improved, and the production cost is reduced.

A drying or treatment in general plant for leather, or similar products, provides a conveyor apparatus of the type with overlapping conveyor belts in which the products are kept in a flat position between the two belts through their run inside the treatment chamber, between a loading station and an unloading station, thanks to the perfect synchronization of the feeding run of the belts and to the complanation of the transmission chains which combine with the transversal stretching means of the belts. The transmission chains of the two belts are shaped as to allow to easily separate the two belts when they come close to the loading and unloading stations, and then to overlap them again.