Tension heat setting equipment and setting process for polyester monofilament

Abstract

The present invention discloses a tension heat setting device for polyester monofilament and its setting process, which relates to monofilament preparation technology and aims to solve the problem that a single treatment method requires the monofilament to undergo multiple stages of heating and setting during heat setting treatment, which makes the production line required for the entire setting process longer and the setting time longer. The key points of its technical solution are: a setting cavity and a wire-feeding channel for the monofilament to pass through are provided in the machine body, and the machine body is provided with: a wire guide mechanism, which is provided in the wire-feeding channel and guides the wire-feeding channel to form a plurality of staggered and annular wire-feeding paths; an oil heating mechanism, which is provided in the setting cavity and immerses the monofilament passing through the lower end of the wire-feeding path in setting oil. The present invention adopts a hot air combined with hot oil setting method, which can further make the monofilament evenly heated when passing through the machine body. By immersing the monofilament in the setting oil, the high temperature of the setting oil can directly heat the monofilament, thereby avoiding uneven heating.

Description

Technical Field

[0001] The present invention relates to a monofilament preparation technology, and more particularly to a tension heat setting device for polyester monofilament and a setting process thereof. Background Art

[0002] Heat setting is a conventional means of fabric processing. During the preparation of fiber monofilaments, the molten fiber material is made into several filamentous monofilaments through a metering pump and a spinneret. After cooling, it needs to be stretched and heat-set to eliminate the internal stress generated by the fiber monofilaments during the stretching process, relax the macromolecules, and improve the stability of the fiber monofilaments.

[0003] The Chinese patent publication number CN105019044B discloses a heat setting device for a monofilament production line. The technical key points are: it includes an oven cover, a pressure roller, a square oil tank for holding high-temperature oil, and a setting motor fixed to the outer side of the oil tank. An electric heater is provided at the bottom of the oil tank, and a setting roller is provided at the upper end of the oil tank. The oven cover covers the oil tank and the setting roller, and oven holes for the entry and exit of the monofilament are opened at both ends of the oven cover; the rotating shaft of the setting roller is rotatably connected to the upper end face of the side wall of the oil tank through a bearing, and the setting motor drives the setting roller to rotate through a pulley assembly. A support beam with adjustable height is provided at the front end of the oil tank. The support beam is parallel to the central axis of the setting roller. The two ends of the support beam are connected to the front end of the oil tank by bolts. The bolts are vertically threaded to the front end of the oil tank, and the bolts are covered with positioning nuts that abut against the lower end face of the support beam.

[0004] Chinese patent publication number CN111549384B discloses a heat setting device for producing highly elastic and wear-resistant polypropylene monofilaments. The key technical features are: it includes an end cover, a box body, a heat storage chamber, a steam generator and a water removal device; the end cover is provided on the top of the box body, a heat storage chamber is provided inside the end cover, an air heating pipe is provided inside the heat storage chamber, the steam generator is located at the lower left of the box body, and the water removal device is located in the middle of the box body.

[0005] In view of this, steam and electric heating are often used for heat setting of monofilaments. When the monofilaments pass through the heat setting equipment, the heat causes the macromolecules in the monofilaments to relax, eliminates the stress generated during stretching, and improves the stability of the monofilaments. After the monofilaments are treated with electric heating or steam, the monofilaments need to be oiled. The single treatment method requires the monofilaments to undergo multiple stages of heating and setting during the heat setting process, which makes the production line required for the entire setting process longer and the setting time longer.

[0006] Therefore, a new solution needs to be proposed to solve this problem. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the object of the present invention is to provide a tension heat setting device for polyester monofilament and a setting process thereof.

[0008] The above technical objectives of the present invention are achieved through the following technical solutions: A tension heat setting device for polyester monofilaments, comprising a body, characterized in that a setting cavity and a wire-traveling channel for the monofilaments to pass through are provided in the body, and the body is provided with:

[0009] The wire guiding mechanism is arranged in the wire traveling channel and guides the wire traveling channel to form a plurality of staggered and annular wire traveling paths;

[0010] The oil heating mechanism is arranged in the shaping cavity, and the shaping oil immerses the monofilament passing through the lower end of the wire path;

[0011] The side-blowing hot air circulation mechanism is arranged in the shaping cavity and is used for heating the monofilament located above the shaping oil liquid level.

[0012] The present invention is further configured as follows: the wire guiding mechanism includes a plurality of wire guide rollers, a plurality of wire guide grooves arranged in an array on the wire guide rollers, and the plurality of wire guide rollers are respectively higher or lower than the liquid level of the shaping oil.

[0013] The present invention is further configured as follows: an oil storage tank for accommodating the shaping oil and a circulation mechanism are provided in the machine body; the circulation mechanism is connected to the side wall and the bottom end of the oil storage tank, and is used to form a flow in the oil storage tank that is opposite to the direction of the monofilament running.

[0014] The present invention is further configured as follows: the circulation mechanism includes a circulation pipe and a booster pump, and the circulation pipe is externally connected to an electric heating thermal oil furnace for regulating the temperature of the shaping oil in the oil storage tank.

[0015] The present invention is further configured as follows: the side-blowing hot air circulation mechanism includes a blowing device and an air duct connected between the blowing device and the machine body.

[0016] The present invention is further configured as follows: the air duct is connected to a heat exchanger, and the heat exchanger is connected to an electrically heated thermal oil furnace.

[0017] The process of tension heat setting of polyester monofilament includes the following specific steps:

[0018] Preheat, turn on the tension setting equipment, set the heating temperature of the electric heating thermal oil furnace, measure the temperature of the setting oil, and adjust the air supply rate of the blower;

[0019] Splicing: After the hot melt extruded monofilaments are cooled in a cooling water tank, they are first wound onto a traction machine, and several monofilament bundles are divided into several monofilaments, which are then knotted with the monofilaments left on the tension setting machine, and the monofilaments are passed through the guide groove on the guide roller;

[0020] In the primary hot air drying, the monofilaments drawn by the godet rollers are first placed above the setting oil, and then the monofilaments above the setting oil are dried by the side-blowing hot air circulation mechanism.

[0021] Immersed in hot oil, the monofilament after the hot air drying treatment passes over the godet roller located below the setting oil and moves to another godet roller, where it is immersed and heated by the setting hot oil;

[0022] Secondary hot air drying: the monofilament soaked in hot oil is guided through the guide roller to another guide roller located above the shaping oil, and then dried again through the side-blowing hot air circulation mechanism.

[0023] The present invention is further configured to include: wiping the monofilaments through a sponge block after the monofilaments are immersed in hot oil, or wiping the entrance of the wire-traveling channel.

[0024] The present invention is further configured as follows: in the specific step of soaking in hot oil, when the shaping oil is at room temperature, an olefin polysulfone type antistatic finishing agent is added to the shaping oil, a circulation mechanism is started for 10-20 minutes, and the conductivity of the shaping oil is controlled to be greater than 400pS / m.

[0025] The present invention is further configured as follows:

[0026] In summary, the present invention has the following beneficial effects:

[0027] The wire guide mechanism forms a ring-shaped wire path for the monofilament in the machine body, which increases the time for the monofilament to be fixed, and can evenly heat the monofilament, eliminate the stress on the monofilament during traction, relax the macromolecules, and improve the stability of the monofilament;

[0028] The hot air combined with hot oil shaping method can further make the monofilament evenly heated when passing through the machine body. By immersing the monofilament in the shaping oil, the high temperature of the shaping oil can directly heat the monofilament to avoid uneven heating. The oil is evenly adhered to the surface of the monofilament, which can play a role of lubrication and protection during the subsequent hot air shaping. The hot air method indirectly heats the oil for a second time, which can efficiently shape the monofilament.

[0029] The hot air circulation side blowing method not only drives the air circulation in the machine body, but also dries the monofilaments that have just entered the machine body under the action of hot air heating, eliminating the moisture carried on the surface of the monofilaments during cooling in the previous water tank, thereby improving the subsequent oiling rate. The heating method of oil immersion can also oil the surface of the monofilaments, which has a good protective effect, shortens the monofilament processing time, and reduces the floor space of the normal monofilament production line.

[0030] When using setting oil for heating and setting, antistatic finishing agent is added to the setting oil, so that the monofilament has good antistatic performance during the setting process, which can reduce the entanglement and knotting caused by static electricity generated by friction during the spinning process of the monofilament, and after the oil heat setting, the excess oil on the surface of the monofilament can be dried by hot air drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention;

[0032] Figure 2 It is a partial cross-sectional view of the present invention;

[0033] Figure 3 for Figure 2 Enlarged schematic diagram of point A in the middle.

[0034] In the figure: 1. Machine body; 2. Godet roller; 3. Circulation pipe; 4. Electric heating thermal oil furnace; 5. Air duct; 6. Heat exchanger. DETAILED DESCRIPTION

[0035] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0036] Example 1: A tension heat setting device for polyester monofilament, such as Figure 1 and Figure 2 As shown, it includes a body 1, which is provided with a molding cavity and a wire-feeding channel for the monofilament to pass through. The body 1 is provided with: a wire guiding mechanism arranged in the wire-feeding channel, which guides the wire-feeding channel to form a plurality of staggered and annular wire-feeding paths; an oil heating mechanism arranged in the molding cavity, which immerses the monofilament passing through the lower end of the wire-feeding path in molding oil; a side-blowing hot air circulation mechanism arranged in the molding cavity, which is used to heat the monofilament located above the liquid level of the molding oil, so that the monofilament enters the molding cavity of the frame through the entrance of the wire-feeding channel, and is guided by the wire guiding mechanism so that the monofilament forms at least one circle in the molding cavity. When passing through the oil heating mechanism and the side-blowing hot air circulation mechanism, the monofilament is sequentially molded by the molding oil and the hot air heating method, which has a good molding effect and realizes the stability of the monofilament in terms of tension strength.

[0037] like Figure 2As shown, the wire guiding mechanism includes a number of wire guide rollers 2, and a number of wire guide grooves arranged in an array on the wire guide rollers 2. The number of wire guide rollers 2 is respectively higher or lower than the liquid level of the shaping oil. In this embodiment, the number of wire guide rollers 2 is divided into two groups of wire guide rollers 2 arranged at the front and rear sections of the wire feeding channel, and the wire guide rollers 2 are divided into oil rollers and guide rollers immersed in the shaping oil, and the oil rollers and the guide rollers are integrally formed with wire guide grooves that are distributed and have an annular concave structure on their surfaces, and the wire guide grooves on the surfaces of the oil rollers and the guide rollers are staggered with each other, so that when the monofilaments pass through the guide rollers and the oil rollers in sequence, friction interference between the monofilaments is less likely to occur during wire feeding, thereby improving wire feeding efficiency and ensuring the quality of the monofilaments.

[0038] like Figure 2 As shown, an oil storage tank and a circulation mechanism for accommodating the shaping oil are provided in the machine body 1. The circulation mechanism is connected to the side wall and the bottom end of the oil storage tank, and is used to form a flow in the oil storage tank that is opposite to the direction of the monofilament routing. Specifically, the circulation mechanism includes a circulation pipe 3 and a booster pump. The circulation pipe 3 is externally connected to an electrically heated thermal oil furnace 4 for regulating the temperature of the shaping oil in the oil storage tank. In this embodiment, the circulation pipe 3 is connected to the machine body 1, and the shaping cavity is connected to the circulation pipe 3. One end of the circulation pipe 3 is connected to the bottom end of the oil tank, so that the shaping oil forms a pressure difference under the action of its own gravity and the extraction of the booster pump, and the circulation pipe 3 is connected to the electrically heated thermal oil furnace 4. By controlling the electrically heated thermal oil furnace 4, the temperature of the shaping oil in the oil tank can be regulated, thereby improving the stability of the monofilament shaping, and forming a flow on the booster pump that is opposite to the movement direction of the monofilament in the shaping oil, which can improve the shaping effect and effect of the monofilament.

[0039] The side-blowing hot air circulation mechanism includes a blowing device and an air duct 5 connected between the blowing device and the body 1. The air duct 5 is connected to a heat exchanger 6, and the heat exchanger 6 is connected to the electrically heated thermal oil furnace 4, so that the circulation pipe 3 is connected to the oil tank, connected to the heat exchange pipe in the heat exchanger 6, and then connected to the electrically heated thermal oil furnace 4, and then the shaping oil heated by the electrically heated thermal oil furnace 4 is transported to one side of the oil tank, and one end of the air duct 5 is connected to a side wall of the upper end of the body 1 through a flange, and is externally connected to the blowing device and then connected to the heat exchanger 6, so that the circulating airflow flows through the heat exchanger 6 and realizes heat exchange through the heat exchange pipe, heating the airflow flowing into the shaping cavity, thereby realizing heating of the hot air with the help of the temperature of the shaping oil, saving electricity.

[0040] Example 2: A process for tension heat setting of polyester monofilaments, using the polyester monofilament tension setting equipment of Example 1, wherein the specific steps of setting include:

[0041] Preheat, turn on the tension setting equipment, set the heating temperature of the electric heating thermal oil furnace 4, measure the temperature of the setting oil, and adjust the air supply rate of the blower;

[0042] Wire splicing: After the hot-melt extruded monofilaments are cooled in a cooling water tank, they are first wound onto a traction machine, and several monofilament bundles are divided into several monofilaments, which are then knotted with the monofilaments left on the tension setting machine. The monofilaments pass through the guide groove on the guide roller 2, and when the monofilaments enter the intersection of the wire channel of the machine body 1, the rotating drum connected at the opening is used to transfer the monofilaments;

[0043] In the first hot air drying, the monofilament pulled by the guide roller 2 is first located above the shaping oil, and the monofilament located above the shaping oil is dried by the side-blowing hot air circulation mechanism. By heating the monofilament with hot air, the monofilament can be stretched and shaped in one step, and a ring structure can be formed. The monofilament can be stretched to improve the stretching stability of the monofilament, or the monofilament can be dried to remove the water vapor carried by the monofilament, so as to facilitate the subsequent oiling treatment.

[0044] Immersed in hot oil, the monofilament after the hot air drying treatment passes around the wire guide roller 2 located below the shaping oil and goes to another wire guide roller 2. The monofilament is immersed and heated by the shaping hot oil. The monofilament is completely in contact with the shaping oil by immersion. The shaping oil directly contacts the monofilament, thereby realizing efficient temperature conduction, making the monofilament fully heated in the shaping oil, eliminating the stress generated by the monofilament during the drawing process, and having good stability and strength.

[0045] Secondary hot air drying: the monofilaments that have been soaked in hot oil are routed through the guide roller 2 to another guide roller 2 located above the shaping oil, and after several monofilaments have been soaked in hot oil, they are wiped with a sponge block to preliminarily remove excess shaping oil on the surface of the monofilaments, and then dried again by the side-blowing hot air circulation mechanism. Through the secondary hot air shaping, on the one hand, the temperature difference during multi-stage shaping can be achieved to test the thermal stability of the monofilament shaping, thereby improving the strength and drawing force of the monofilament, and on the other hand, the monofilaments after being soaked in oil can be dried to make the oil on the surface of the monofilament evenly adhered.

[0046] In the specific steps of hot oil dipping, when the setting oil is at room temperature, an olefin polysulfone type antistatic finishing agent is added to the setting oil, the circulation mechanism is started for 10-20 minutes, and the conductivity of the setting oil is controlled to be greater than 400pS / m. By controlling the conductivity of the setting oil mixed with the antistatic finishing agent at room temperature to be greater than 400pS / m, as the subsequent setting oil is gradually heated by the electrically heated thermal oil furnace 4, the conductivity of the setting oil containing the antistatic finishing agent increases with the increase of temperature, which can reduce the conductivity of the setting oil during the setting process. There is a risk of flammability due to friction, and at the same time, the antistatic performance of the monofilament can be improved. In this embodiment, the specific antistatic finishing agent is an ashless antistatic agent, and the antistatic agent is an olefin polysulfone type, which realizes ion conduction or moisture absorption through the easily ionized groups present therein, forming a leakage charge channel, so it can effectively eliminate static charge, improve the conductivity of the setting oil, increase the charge leakage rate, reduce the charge accumulated in the setting oil, lower the potential, and achieve the effect of static elimination. In this embodiment, the setting oil is a low-melting mixture type heat transfer oil of biphenyl and diphenyl ether.

[0047] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A process for tension heat setting of polyester monofilament, characterized by: The specific steps of its finalization include: Preheating, turning on the tension setting equipment, setting the heating temperature of the electric heating thermal oil furnace (4), measuring the temperature of the setting oil, and adjusting the air supply rate of the blower; Splicing the monofilaments, after cooling them in a cooling water tank, firstly wind them onto a traction machine, and separate a number of monofilament bundles into a number of monofilaments, and respectively tie them with the monofilaments left on the tension setting machine, and pass the monofilaments through the guide groove on the guide roller (2); In the primary hot air drying, the monofilaments drawn by the guide roller (2) are first located above the setting oil, and the monofilaments located above the setting oil are dried by the side-blowing hot air circulation mechanism; Immersing in hot oil, the monofilament after the hot air drying treatment passes around the guide roller (2) located below the setting oil and moves toward another guide roller (2), and is immersed in the setting hot oil and heated; Secondary hot air drying: the monofilaments soaked in hot oil are routed through a guide roller (2) to another guide roller (2) located above the shaping oil, and are dried again through a side-blowing hot air circulation mechanism; The processing adopts a tension setting device for polyester monofilament, and the tension setting device comprises: a machine body (1), wherein a setting cavity and a wire-passing channel for the monofilament to pass through are provided in the machine body (1), and wherein: The wire guiding mechanism is arranged in the wire traveling channel and guides the wire traveling channel to form a plurality of staggered and annular wire traveling paths; The oil heating mechanism is arranged in the shaping cavity, and the shaping oil immerses the monofilament passing through the lower end of the wire path; A side-blowing hot air circulation mechanism is provided in the shaping chamber and is used to heat the monofilament above the shaping oil level; The wire guide mechanism includes a plurality of wire guide rollers (2), a plurality of wire guide grooves arranged in an array on the wire guide rollers (2), and a plurality of the wire guide rollers (2) are respectively higher or lower than the liquid level of the shaping oil. The body (1) is provided with an oil storage tank for accommodating the shaping oil and a circulation mechanism. The circulation mechanism is connected to the side wall and the bottom end of the oil storage tank and is used to form a flow in the oil storage tank that is opposite to the direction of the single wire running. The circulation mechanism includes a circulation pipe (3) and a booster pump. The circulation pipe (3) is externally connected to an electrically heated thermal oil furnace (4) for regulating the temperature of the shaping oil in the oil storage tank. The side-blowing hot air circulation mechanism includes a blast device and an air duct (5) connected between the blast device and the body (1). The air duct (5) is connected to a heat exchanger (6), and the heat exchanger (6) is connected to the electrically heated thermal oil furnace (4).

2. The process for tension heat setting of polyester monofilament according to claim 1, characterized in that: Also includes: After several monofilaments are immersed in hot oil, they are wiped with a sponge block, or the entrance of the wire channel is wiped.

3. The process for tension heat setting of polyester monofilament according to claim 1, characterized in that: In the specific step of soaking in hot oil, when the setting oil is at room temperature, an olefin polysulfone type antistatic finishing agent is added to the setting oil, a circulation mechanism is started for 10-20 minutes, and the conductivity of the setting oil is controlled to be greater than 400pS / m.

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