39results about How to "Reduce waste silk" patented technology

The invention relates to a high-modulus low-shrinkage stiff cord and a preparation method thereof. The preparation method comprises the following steps: performing solid-phase polycondensation-viscosity enhancement, melting, metering, extrusion, cooling, oiling, stretching, heat setting and winding to obtain high-modulus and low-shrinkage polyester industrial yarns; twisting to obtain a cord; making the cord into a high-modulus low-shrinkage stiff cord by a two-bath impregnation method, wherein during cooling, the longitudinal height is kept constant and the cross-sectional area of a slow cooling chamber is increased; meanwhile, the surface temperature of a spinneret plate is kept in a heat preserving way in the slow cooling chamber; an oiling agent contains 67.30 to 85.58 percent by weight of crown ether; during use of the oiling agent, 14 to 18 percent by weight emulsion is prepared with water. The preparation method disclosed by the invention is simple; the prepared high-modulus low-shrinkage stiff cord is made from modified polyester of which the molecular chain includes a terephthalic acid chain segment, an ethylene glycol chain segment and a dihydric alcohol chain segment with a branched chain, is greater than or equal to 80N in breaking strength, and is greater than or equal to 37KN / m in cord bonding strength.

The invention discloses a one-step method for producing polyester-spandex empty-covered yarn for yarn replacement, which includes the following content: the spandex yarn can be replaced without running out, and the polyester POY yarn is not cut. Once the spandex yarn runs out, the wire detector will send a signal to the cutter to cut off the polyester POY yarn at the same time. This is the normal protection program of the machine and cannot be changed, otherwise it will affect the normal operation of the machine. In this case, both the polyester yarn and the spandex yarn must be raised again, and there will be abnormal yarns on the surface of the finished empty-covered yarn, and this part of the abnormal yarn must be stripped to increase the consumption of waste yarn. Spandex is used to change the yarn without running out. When the spandex yarn is about to be finished and the thin skin is seen in the paper tube, first use the doffing suction gun at the three rollers to suck the yarn tow, and pull off the spandex yarn that is about to be finished. The one-step method for producing polyester / spandex air-covered yarn replacement produces less waste silk, shortens the empty spindle time of the machine, has higher production efficiency, is simple and convenient to operate, and can effectively reduce the risk of work-related injuries.

The invention discloses a network distributor gas supply pipeline network system, comprising at least two levels of network air pressure air pressure stabilizing devices, wherein, each level of network air pressure air pressure stabilizing device is provided with a plurality of buffer tanks, one end of each buffer tank is communicated with an air inlet and the other end is communicated with at least two air outlets, the level one network air pressure air pressure stabilizing device is provided with a buffer tank, each air outlet of each buffer tank in each level of network air pressure air pressure stabilizing device is respectively communicated with the air inlet of one buffer tank in the next level of network air pressure air pressure stabilizing device, and each air outlet of each buffer tank in the last one level of network air pressure air pressure stabilizing device is respectively communicated with the network distributor. The network distributor gas supply pipeline network system is a multi-level multi-branch system, air flow is subject to buffer through multiple buffer tanks, so that the air pressure is more stable, the degree of network and network uniformity of filaments and mixed filaments are increased, the winding tension is stabilized, end breaking and waste filaments are reduced, the production state is improved, and the product quality, production efficiency and economic benefit are improved.

The invention provides a string-up switching mechanism of a winding machine, and relates to the field of textile machinery. The string-up switching mechanism comprises a move-down silk plate and a shoveling plate, wherein a slideway is arranged on the shoveling plate, and a sliding head matched with the slideway is arranged on the move-down silk plate; a groove for hooking and pulling a silk beam is formed in one side of the move-down silk plate; and a bending way opposite to the one side of the groove is arranged at the slideway. The string-up switching mechanism of the winding machine has high string-up switching success rate, the waste silk quantity can be greatly reduced, and meanwhile the product quality is increased. As the improvement cost is low, the string-up switching mechanism is also suitable for large-range popularization and application.

The invention relates to a spinning method for prolonging the plate-clearing period of special-shaped cross-section fiber production. The longitudinal height is kept unchanged, and the area of the cross section of a slow cooling cavity is increased; meanwhile, the slow cooling cavity keeps the plate surface temperature of a spinneret by utilizing natural heat preservation and additionally arranging a heat insulation plate on the lower portion of a heat preservation plate to extend a wind-free region; the plate-clearing period of special-shaped cross-section fiber production is prolonged by 35-55%; increase of the cross section area of the slow cooling cavity means that the cross section of the slow cooling cavity is changed from round to rectangular on the premise that the spinneret connected with the slow cooling cavity is kept unchanged. A cylindrical slow cooling cavity is changed into the rectangular cylindrical slow cooling cavity, the spinning oligomer escape space is expanded, an active heating type slow cooling area is changed into a non-heating heat preservation type, the gathering quantity and hardness of oligomers on the high-temperature spinneret are reduced, special-shaped cross-section fiber plate-clearing period is greatly prolonged, the production efficiency is improved, the energy consumption is reduced, waste fibers are reduced, the spinning quality is improved, and the labor intensity of workers is reduced.

The invention relates to a washing device of a PET (polyethylene terephthalate) liquid-phase tackifying kettle and a washing process using the washing device for washing the tackifying kettle, and belongs to the technical field of polyester fiber production. The washing device comprises a segmented heater, a solvent injection pipe, a circulation pipe, a buffer tank, a condenser and a liquid seal tank, wherein the segmented heater is arranged in an outer wall jacket of the tackifying kettle; the solvent injection pipe is arranged at the top of the tackifying kettle; one end of the buffer tank is connected with the tackifying kettle through the circulation pipe, and the other end of the buffer tank is connected to the top of the condenser through a steam pipe; a circulative pipe is arranged at the bottom of the condenser and divided into two branch pipes, one branch pipe is connected to the bottom of the buffer tank, and the other branch pipe is connected to the bottom of the liquid seal tank; and the upper part of the liquid seal tank is connected to the top of the condenser, and control valves are arranged on two branch pipes of the circulative pipe respectively and used for controlling connection and disconnection of corresponding pipelines. The washing device has the advantages of high washing efficiency, low cost and the like.

The invention belongs to the technical field of polypropylene fiber production. Aiming at the problem that the existing red pigment is not easily dispersed in the polypropylene raw material mixture, which causes the color difference of the polypropylene fiber, the invention provides a polypropylene raw material mixture in which the red pigment is fully dispersed and a preparation method, which consists of the following The composition of each component in mass percentage: polypropylene powder ≥ 48%, red pigment 27-30%, polyethylene wax ≥ 17%, electrostatic agent 0.95-1%, silicone powder 0.05-0.1% and zinc stearate 2.5% ~3%, the sum of the mass percentages of the above-mentioned components is 100%, the softening point of polyethylene wax is ≥120°C, first rotate and mix at low speed during preparation, and then fully rotate and mix at high speed. The permanent brilliant red in the polypropylene raw material is fully dispersed, no raw powder is produced, the aging time is prolonged, and the service life of the spinning assembly is improved. The color of the obtained polypropylene fiber is good, there is basically no color difference, and the amount of waste yarn is also greatly reduced.

The invention relates to the technical field of metal wire processing equipment and in particular relates to a spiral die box structure for a wire drawing machine. The spiral die box structure comprises a die box, wherein a steel wire inlet is formed in the left end face of the die box; the right end face of the die box and the steel wire inlet are coaxially provided with spiral devices; a screw plug is arranged in a hole in the left end of each spiral device; the spiral devices and the screw plugs are sealed through sealing rings; and a sealing piece is arranged at the joint of each spiral device and the die box. A steel wire is thinned through a wire drawing die, enters the spiral die box and is processed into a beautiful spiral rib steel wire. The spiral die box is improved and is provided with the two spiral devices, so that the speed of producing spiral rib steel wires is high, the failure rate is low, and few waste wires are generated; and moreover, the spiral die box structure is simple, reliable, convenient to use, low in manufacturing cost and easy to maintain.

The invention provides a control method for preventing POY (Pre-Oriented Yarn) fineness from generating midway variation. The method provides a control system for preventing the POY fineness from generating the midway variation. The system comprises a melt metering pump frequency converter for controlling a rotary speed of a melt metering pump, a winding machine controller for controlling a winding machine to operate and a PLC (Programmable Logic Controller), wherein the melt metering pump frequency converter is connected with the melt metering pump for spinning POY; the winding machine controller is connected with the winding machine for spinning the POY; the melt metering pump frequency converter and the winding machine controller are connected with the PLC respectively. According to the control method, the problems that the POY metering pump has faults and manual faulty operation is not found in time to cause that the POY middle fineness becomes small can be reduced greatly; therefore, the problem that the dyeing is not uniform, caused by the fineness, and the amount of waste silks are reduced.

The invention discloses a glass fiber wire drawing machine and a wire breaking device. The wire breaking device comprises a wire cutting ring and at least one wire cutting block fixed on the outer periphery of the wire cutting ring in the circumferential direction to cut the glass fiber. The wire block is conducive to fast wire cutting; the outer circumference of the wire cutting ring has a circular groove for glass fiber winding and a conical groove whose small diameter end is adjacent to the circular groove to guide the glass fiber to be wound to the head. The setting of the conical groove can be adjusted. The glass fiber can be wound quickly, avoiding excessive winding of the glass fiber in the annular groove, which is conducive to reducing the amount of waste wire; all cutting blocks are located between the annular groove and the conical groove, and the outer circumference of the cutting ring has several axially extending And through the broken wire groove of the annular groove and the conical groove, the broken wire groove is used to cut the glass fiber. The glass fiber is cut by two ways of cutting wire block and wire breaking groove, so as to avoid excessive entanglement of glass fiber in the cutting ring, avoid wasting glass fiber, reduce the amount of waste wire, and help reduce production cost.

The invention discloses a preparation method of polyethylene terephthalate for industrial yarn. In the batching stage before the esterification reaction, alkali metal acetate is added, and the alkali metal acetate plays an important role in the esterification reaction. The obtained polyester product has less fuzz and broken ends in the subsequent spinning process, strong antistatic performance during drawing, strong tensile strength of the finished product, and reduced amount of waste yarn in the spinning process.