79results about How to "Avoid yarn breakage" patented technology

The invention discloses a yarn guiding device for textile product production. The device comprises a fixing bottom plate, a guiding assembly, a burr removing assembly and an adjusting assembly, the burr removing assembly comprises a guiding tube, a heating sleeve tube and a supporting frame, the heating sleeve tube is sleeved with the guiding wire, a heating wire is arranged in the heating tube, the adjusting assembly comprises a fixing plate, an adjusting plate and a pressurizing screw rod, the fixing plate is located on the limiting frame, a tensioning roller is arranged below the bottom ofthe adjusting plate, and the pressurizing screw rod is sleeved with the limiting plate. According to the yarn guiding device, yarns can be welled guided to prevent the yarns from breaking in the conveying process, the adjustment of the angle of the yarns can be conducted according to the conveying angle of the yarns, the using range of the guiding device is expanded, burrs, impurities and the likeon the yarns are removed through the burr removing mechanism to improve the quality of the yarns, and tensioning force in the yarn conveying process can be conducted by the adjusting assembly according to the conveying demands of the yarns to help the conveying of the yarns.

The invention provides a discontinuous long fiber reinforced thermoplastic composite material mold pressing precast body and a preparation method thereof. The mold pressing precast body comprises slices formed by slitting/cutting of continuous fiber reinforced thermoplastic composite material preimpregnated sheets/preimpregnated yarns, wherein the length L range of the slices is 5-200 mm, the width W range of the slices is 2-30 mm, and the weight percentage content of fibers in the slices is 20-90 wt%; and high-strength isotropous complicated parts with high size stability can be prepared through secondary mold pressing of the precast body, so that the defects of easy warpup, fiber length loss, weaker part performances, anisotropic mechanical performances of continuous fiber reinforced composite materials and difficult machining of different-thickness complicated parts after mold pressing injection molding of short-fiber and long-fiber particles are made up.

The invention discloses a yarn splicing guide device of an automatic bobbin winder. The device comprises a splicer and a guide bracket, wherein the splicer is used for grabbing a large suction nozzle at the upper yarn end and grabbing a small suction nozzle at the lower yarn end, and the guide bracket keeps a fixed position with the splicer; the guide bracket supports a yarn guide hook in a swing mode, and the yarn guide hook is mutually and fixedly connected with a guide swing arm; the yarn guide hook and an upper yarn passage form space intersection, and an arm end part of the guide swing arm is positioned on a rotary track of the small suction nozzle; and the guide bracket is also provided with an offsetting spring for rotating and offsetting the yarn guide hook. The yarn guide hook is mutually and fixedly connected with the guide swing arm through a connecting sleeve which is sleeved on a yarn guide hook support shaft in a swing mode; the yarn guide hook support shaft is vertically and fixedly arranged on the guide bracket; and the yarn guide hook and the guide swing arm are crossed and staggered in space. The yarn splicing guide device has the advantages of simple structure, accurate yarn guide and good splicing quality, and is widely applied to various automatic bobbin winders.

A broken yarn self-stop device comprises a test device and an execution device, and is characterized in that the execution device is provided with a regulating part for regulating tension of yarns and the regulating part comprises a fixing plate, a regulating plate, a regulating bar and a regulating handle, the fixing plate and the regulating bar are fixedly connected, the regulating plate and the regulating bar are in thread connection, the regulating handle is rotated to regulate the gap between the fixing plate and the regulating bar, thus regulating tightness of yarns, greatly enhancing tensile capacity of yarns, avoiding yarn breakage due to unstable tension of yarn looping machine. The test device in the invention is extremely simple in comparison with the prior art, and the running stability and maintainability of the test device are improved.

The invention discloses a yarn tension device for a warp knitting machine. The yarn tension device comprises a cylinder fixation seat, a cylinder, a cylinder pull head, a steel rope, a yarn through rod, rotary wheels, an air supply tube, a pressure gauge, a valve, an air storage tank, a tension spring, a yarn guide cap, a yarn and the like, wherein the rotary wheels are installed at the both ends of the yarn through rod, the tension spring is uniformly installed at the middle, and the yarn guide cap is clamped at the tail end of the tension spring; the yarn is woven by a machine table round the yarn guide cap; one end of the cylinder is located on the fixation seat, and the cylinder pull head at the other end is provided with the steel rope; the other end of the steel rope is fixed on the rotary wheel; in this way, the yarn through rod is tensioned as long as the cylinder works, thus tensioning the yarn guide cap; the air storage tank is installed on the machine table of the warp knitting machine, and an air compressor in a workshop is used for supplying air to the air storage tank; air in the air storage tank enters the cylinder through the air supply tube; a pressure in the cylinder is adjusted by a pressure adjusting valve, and the pressure is adjusted according to the tension of the yarn; the pressure display gauge is capable of displaying the air pressure during the working of the cylinder, thus facilitating operation.

The invention discloses a spindle mechanism capable of reducing vibration amplitude. The spindle mechanism capable of reducing vibration amplitude comprises a spindle (10), a spindle base (20), a bearing (30) and a core fixing device (40) installed on the spindle base (20), wherein the core fixing device (40) comprises a fastening component (43) located above the spindle (10), a groove (431) is formed in the bottom end of the fastening component (43), the groove (431) can cover the top end of the spindle (10), and therefore when the spindle rotates, the vibration amplitude of the spindle is limited by the groove. According to the technical scheme, the core fixing device is additionally arranged on the spindle, the original structure of the spindle does not need to be changed, installation is convenient, broken yarn caused by large vibration amplitude when the spindle rotates can be avoided, and winding smoothness is improved.

The invention relates to a method for feeding in and starting a thread in a false twist texturing device. Said device has a heat exchanger (1) containing a fluid. Said heat exchanger has at least two yarn passages (4, 5, 6) which are provided for guiding the yarn through and for sealing the heat exchanger (1). Said yarn passages (4, 5, 6) are enlarged for introducing the yarn. Alternatively, the yarn is drawn through the yarn passages (4, 5, 6) by suction and/or blown through by means of an auxiliary airflow or pulled through by means of an awl. The heat exchanger (1) in the false twist texturing device pertaining to this method is divided along the direction of passage of the yarn and the parts (2, 3) for introducing the yarn into the heat exchanger can be removed from each other. Alternatively, an injector nozzle (37) is arranged before and/or after the individual yarn passages (4, 5, 6) on the yarn inlet (4) and/or on the yarn outlet (5) for guiding the yarn through the yarn passage.

The invention discloses an automatic drafting machine and a drafting method thereof. The machine comprises a heddle, a rail, a crochet hook and a wallboard. The rail is half-enclosed, is composed of an upper concave block and a lower concave block which are oppositely arranged, and one side of the rail is fixed to the wallboard. The heddle is arranged on one side of the rail. A heddle eye is arranged at the position, corresponding to the position of the rail, of the heddle. After the crochet hook hooks a warp yarn, the crochet hook passes through the heddle eye and the rail, and then the drafting is completed. Nozzles are uniformly distributed in the length direction of the rail. The beneficial effects of the machine are that the nozzles are uniformly mounted in the rail through which the crochet hook passes; the nozzles are connected to an external air compression device, and the nozzles inject air in the rail; and when the crochet hook normally hooks the yarn and passes through the rail, the yarn which is attached on the surface of the rail as static electricity is generated due to friction can be blown out of the rail, so that mistakes can be reduced.

The invention relates to a heating remover for short piles on yarns; the heating remover is characterized by comprising a driving bobbin, a driven bobbin, a base, a vertical rod, and an electric heating ring; the driving bobbin is movably connected with a first connection frame, the first connection frame is fixedly connected with the base, the driving bobbin is connected with a motor through a transmission mechanism, and the motor is mounted on the base. The heating remover has the advantages that the heating remover can remove short piles on the surface of yarns, breakage of yarns is avoided during removal of the short piles on the yarns, one-off removal of short piles is achieved, and repeated removal by carding is not required.

The invention relates to a method for winding yarn (16) on a bobbin (18) to form an intersected coiled bobbin (5). The bobbin held in a bobbin creel (8) can be driven by a device (9) driven by a individual motor, and the yarn is moved on the intersected coiled bobbin (5) by using a traversing gear (10) driven by the individual motor, finally bobbin is formed gradually, wherein the taper coefficient is adopted to actuate the single motor drive unit (14) of the traversing gear (10). The taper coefficient represents the ratio of the movement rate of the yarn at the end face of the intersected coiled bobbin (5). On the cylindrical bobbin, when the intersected coiled bobbin runs, the taper coefficient is increased or reduced from 1 in yarn twisting direction. The taper is appended on the bobbin creel (8) to make the bobbin lean towards the horizontal line. The appended taper is in accordance with the asymmetrical yarn because of the change of taper coefficient at least in the direction.

The present invention relates to a method and a device for determining the necessary speed of rotation of a coil drive roller, which particularly reduces rotation speed fluctuation of crossly wound coils (8) when a winding stroke is started. In a station (2) of a spinning machine (1), besides cylindrical crossly wound coils (8), conical crossly wound coils are manufactured in a so-called twisting winder (4). For the uniform roller structure, feeding of a constant winding tension to the yarn (7) is very important. Winding tension fluctuation can cause yarn fracture besides yarn layer loosening, and affects continuous spinning and winding processes. For preventing this effect, the invention prescribes that: angular momentum of the crossly wound coils (8) is detected through the sensor and calculated according to time sequence of a corresponding driving diameter before paving or splicing, so as to select the rotation speed of the coil drive roller (10) before the winding stroke.

The invention discloses a yarn positioning electrostatic treatment device. The yarn positioning electrostatic treatment device comprises a rack and an automatic control system. The rack is provided with a linear guide rail, the linear guide plate is provided with a mounting plate, a hydraulic oil cylinder is arranged on the side face of the mounting plate and provided with a piston rod, a single section of the linear guide rail is provided with a sliding block, the piston rod drives the sliding block, a movable plate is arranged at the bottom of a positioning table, the rack is provided with ahorizontal supporting plate, and a positioning and collating device is arranged on the top face of the horizontal supporting plate. The positioning and collating device comprises a positioning support rotationally connected with rotary arms, a roller is arranged between the rotary arms, the roller is provided with a positioning groove, handles are arranged on the side faces of the rotary arms, the handles are arranged on the movable plate, the automatic control system is in drive connection with a lifting rod, and the lifting rod drives an ion stick. Yarn is positioned and collated, the yarnis conveyed along a certain path, the tension of the yarn in the conveying process is adjusted, meanwhile, the ion stick is adopted for electrostatic neutralizing treatment, and the yarn breakage phenomenon of the yarn is avoided.

A yarn winding unit includes a winding section that winds a yarn around a winding tube to form a package, and a control section that controls the winding section. The winding section includes a winding tube supporting section that supports the winding tube, a contact roller that rotates in contact with the winding tube or the package, and a traversing device that is arranged independently of the contact roller and that traverses the yarn that is to be wound around the winding tube. The control section controls the winding section such that the traversing speed of the traversing device is maintained equal to or below a predetermined speed when the winding of the yarn is started.

The invention relates to a single-yarn control device of a computer type Jacquard warp knitting machine, which comprises an upper yarn guide rod, a weight transmitter, an adjuster and a sliding seat, wherein the sliding seat can move on the upper yarn guide rod; a locking screw is arranged between the sliding seat and the upper yarn guide rod; a sensor of the weight transmitter is fixed on the sliding seat; a sensing roller is fixed on the sensor; the adjuster is provided with a servo motor and a roller bracket which are arranged on the sliding seat, a driving rubber roller connected to the roller bracket, and a floating rubber roller pressed on the driving rubber roller; the driving rubber roller is driven by the servo motor to rotate; and the sliding seat is also provided with a front yarn guide roller and a back yarn guide roller. The device better solves the problem that the connection of the front and the back sheets of a seamless forming product has seams because of the over loose of single yarn; the clearness of a hollow flower shape can be simultaneously guaranteed in knitting meshes, in particular the clear flower type with three-dimensional feeling can be knitted on the Jacquard surface layer of interval Jacquard fabrics with double needles, i.e. sandwich Jacquard fabrics..

The invention discloses online detection equipment forglass fiber yarn based on machine vision, which comprises an LED line light source erected above the glass fiber yarn, wherein an industrial camera is arranged on one side of the LED line light source, the LED line light source and the industrial camera are connected in parallel with an acquisition trigger control panel, the acquisition trigger control panel is also connected with a rotary encoder, the rotary encoder is located on a glass yarn production line, the industrial camera is connected with the input end of the industrial control computer, and the output end of the industrial control computer is connected with a defect alarm prompter. The invention further discloses a detection method of the online detection equipment for the glass fiber yarn based on machine vision, the machine vision technology is adopted, non-contact and non-damage detection of the glass fiber yarn is achieved, and the problem of non-hair detection in the prior art is solved.

The invention discloses a spindle mechanism provided with a core fixing device. The spindle mechanism provided with the core fixing device comprises a spindle (10), a spindle seat (20), a bearing (30) and the core fixing device (40) mounted on the spindle seat (20). The core fixing device (40) comprises a fastening component (43) located above the spindle (10), a groove (431) is formed in the bottom end of the fastening component (43), and the groove (431) can cover the top end of the spindle (10), thus, when the spindle rotates, the amplitude of vibration of the spindle is limited by the groove. According to the technical scheme, the core fixing device belongs to a device attached to the spindle, the original structure of the spindle does not need to be changed, installation is convenient to carry out, occurrence of the yarn breaking situations generated due to oversize vibration amplitude during rotating of the spindle can be avoided, and smoothness of winding is improved.

The invention relates to a yarn tension constant compensation device. The device comprises a rack and multiple yarn guiding rods installed on the rack, a tension compensation mechanism is connected to each yarn guiding rod, each tension compensation mechanism comprises a damping cylinder, a spring arranged on the outer surface of the damping cylinder in a sleeving mode and a clamping ring, wherein one end of the damping cylinder is fixed to the rack, the other end of the damping cylinder is connected with the corresponding yarn guiding rod through a connecting plate, the spring is clamped between the end, connected to the connecting plate, of the damping cylinder and the clamping ring, the clamping ring is in threaded connection with the damping cylinder, a piston assembly inside the damping cylinder comprises a piston rod, a piston and a fixing part used for fixing the piston, the piston comprises a piston body and multiple piston sheets installed at the two ends of the piston body, the piston body is provided with multiple first oil channels and second oil channels which are cut through in the axial direction, and the first oil channels and the second oil channels are distributed at intervals in the circumference direction of the piston body. The yarn tension constant compensation device is applicable to damping and yarn-breaking-prevention of the yarn guiding rods on textile equipment.

A yarn heater 1 is provided, in particular for a false twist texturing machine, comprising a heating zone 3 with a yarn channel 5, on which at least one heating wall 7 is arranged, a heating device 9 is provided for heating Said heating wall 7, arranges a yarn guide 11 in said yarn channel 5, wherein the yarn guide 11 is arranged such that the yarn course 13 predefined by the yarn guide 11 has a zigzag shape. This yarn heater is especially suitable for the false twist texturing process as a main heater for heating polyamide yarns.

The invention relates to the technical field of textile production, and specifically discloses a yarn finishing device for a textile machinery. The yarn finishing device for the textile machinery comprises a pedestal, a support frame is fixedly mounted at a left side of the pedestal through a bolt, moreover, at least three guide blocks arranged at equal distance are integrally formed on the support frame, a centering column is integrally formed on an upper end of each guide block, and a yarn cone for winding yarns is mounted on the centering column through sleeving connection. Beneficial effects: the yarn finishing device designed by the invention is convenient to use, can effectively sorting and ordering the yarns through ring-shaped yarn grooves on a traction roller and an adhesive roller, also can realize tensioning for the yarns through cooperation of a tensioning spring and the adhesive roller, and thus, can effectively avoid problems, such as breaking of the yarns caused by intertwining and friction among the yarns; moreover, the device also can effectively remove redundant fibers on the yarns through a vacuum pump and the adhesive roller, and consequently can effectively avoid interference on follow-up textile processing caused by the redundant fibers.