360° spraying method of glass fiber antistatic agent

Abstract

The invention discloses a 360° spraying method of an antistatic agent for glass fiber, wherein the antistatic agent is atomized by a pneumatic atomizing nozzle and then sprayed onto a glass fiber bundle, and then the oil mist of the antistatic agent that is not adsorbed is reflected by a reflector and then sprayed onto the glass fiber bundle for a second time. The method improves the utilization rate of the antistatic agent on the glass fiber bundle, improves the adsorption rate of the antistatic agent, and realizes 360° surrounding spraying on the glass fiber bundle. The spraying rate and retention rate of the antistatic agent on the glass fiber bundle can even be close to 100%, thereby ensuring that the antistatic agent on the surface of the glass fiber bundle will not be significantly separated during subsequent processing and use, thereby improving product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of glass fiber production equipment, and in particular to a 360° spraying method of a glass fiber antistatic agent. Background Art

[0002] Glass fiber is an inorganic non-metallic material with excellent performance. It is made of pyrophyllite, quartz yarn, limestone, dolomite, colemanite, and magnesia stone as raw materials through high-temperature melting, wire drawing, winding, weaving and other processes. The diameter of its single filament is several microns to more than 20 microns, which is equivalent to 1 / 20~1 / 5 of a hair. Each bundle of fiber raw filaments is composed of hundreds or even thousands of single filaments. It has the advantages of good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. Glass fiber is usually used as a reinforcing material, electrical insulation material, and thermal insulation material in composite materials. It is widely used in petrochemical, electronic power, transportation, aerospace, national defense and military industries, and plays an increasingly important role in the national economy.

[0003] During the processing or use of glass fiber, friction will generate static electricity, and the high insulation and low water absorption of glass fiber itself make static electricity difficult to eliminate, so static electricity is easily accumulated. In order to improve the smoothness of the downstream processing and use of glass fiber, reduce the phenomenon of glass fiber fuzzing, piling up, and uneven dispersion due to static electricity, and at the same time to avoid product quality fluctuations caused by static adsorption during the use of glass fiber by customers, antistatic agent treatment is usually carried out during glass fiber processing, which is referred to as oiling. Currently, there are two main types of oiling: immersion and coating. The immersion method is to immerse the glass limiter into the antistatic agent. This method cannot make the antistatic agent 100% attached to the glass fiber bundle. The retention rate of the antistatic agent on the glass fiber is only 70~80%, and the antistatic agent has relatively weak adhesion and is easy to fall off during the later processing. The coating method is that the antistatic agent is evenly coated on the surface of the glass fiber from the outlet of the oil coating device. The disadvantage is that it is impossible to effectively control the coating amount of the antistatic agent according to the respective characteristics of different products produced. It is easy to have uneven coating of the antistatic agent and accumulation of the antistatic agent, which will affect the quality of the downstream glass fiber. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the existing glass fiber oiling method, the present invention provides a 360° spraying method of a glass fiber antistatic agent.

[0005] The technical solution adopted by the present invention is as follows: a 360° spraying method of a glass fiber antistatic agent, which uses an antistatic agent oil mist generated by a pneumatic atomizing nozzle to spray from one side of a glass fiber bundle, and uses a reflector to rebound the antistatic agent oil mist that is not adsorbed to spray from the other side of the glass fiber bundle, while the glass fiber bundle keeps moving.

[0006] Preferably, the steps are as follows:

[0007] Step 1, setting the flow rate of the antistatic agent and the process parameters of the pneumatic atomizing nozzle according to the specifications of the glass fiber bundle;

[0008] Step 2, passing the glass fiber bundle through the spraying action area formed by the pneumatic atomizing nozzle and the radiating element;

[0009] Step 3, start the traction device and the pneumatic atomizing nozzle at the same time, the traction device drives the glass fiber bundle to move continuously along the axial direction, the pneumatic atomizing nozzle sprays, and the reflector rebounds the antistatic agent oil mist for secondary spraying;

[0010] Step 4: using a reflector to collect the antistatic agent that is not adsorbed to the glass fiber bundle and reusing it.

[0011] Preferably, each glass fiber bundle contains 100 to 450 filaments, the diameter of the filament is 0.07 to 0.10 mm, the moving speed is 5 to 6 m / s, the mass flow rate of the antistatic agent in the pneumatic atomizing nozzle is 1.00 to 5.46 g / min, and the pressure of the compressed air is 0.15 to 0.25 MPa.

[0012] More preferably, each of the glass fiber bundles contains 100 to 150 filaments, the filament diameter is 0.07 to 0.10 mm, the moving speed is 5 to 6 m / s, the mass flow rate of the antistatic agent in the pneumatic atomizing nozzle is 1.00 to 3.00 g / min, and the compressed air pressure is 0.15 to 0.25 MPa.

[0013] Alternatively, each of the glass fiber bundles contains 200 to 300 filaments, the diameter of the filaments is 0.07 to 0.10 mm, the moving speed is 5 to 6 m / s, the mass flow rate of the antistatic agent in the pneumatic atomizing nozzle is 3.00 to 4.00 g / min, and the compressed air pressure is 0.15 to 0.25 MPa.

[0014] Alternatively, each of the glass fiber bundles contains 300 to 450 filaments, the diameter of the filaments is 0.07 to 0.10 mm, the moving speed is 5 to 6 m / s, the mass flow rate of the antistatic agent in the pneumatic atomizing nozzle is 4.00 to 5.46 g / min, and the compressed air pressure is 0.15 to 0.20 MPa.

[0015] Preferably, the pneumatic atomizing nozzle comprises an ejector pin and a nozzle, and the gap between the ejector pin and the nozzle is adjustable.

[0016] Preferably, the pneumatic atomizing nozzle includes a pin, a nozzle and an air cap arranged from the inside to the outside, a liquid outlet is formed between the needle tip of the pin and the mouth of the nozzle, an air outlet is formed between the mouth of the nozzle and the cap opening of the air cap, and an adjusting end is provided at the tail of the pin, which drives the pin to slide axially to achieve gap adjustment.

[0017] Preferably, the regulating end is a piston structure and is equipped with a piston cylinder on the outside. The regulating end divides the piston cylinder into a regulating chamber and a reset chamber. The regulating chamber is connected to the regulating air inlet, and an elastic member that acts on the regulating end is installed in the reset chamber.

[0018] Preferably, the pneumatic atomizing nozzle is arranged above the glass fiber bundle, and the reflector is correspondingly arranged below the glass fiber bundle.

[0019] Preferably, the pneumatic atomizing nozzle is arranged obliquely toward the advancing direction of the glass fiber bundle.

[0020] The present invention has the following beneficial effects: the present invention utilizes a pneumatic atomizing nozzle to atomize the antistatic agent and then sprays it onto the glass fiber bundle, and then utilizes a reflector to reflect the antistatic agent oil mist that is not adsorbed and then sprays it onto the glass fiber bundle for a second time. This method improves the utilization rate of the antistatic agent on the glass fiber bundle, improves the adsorption rate of the antistatic agent, and realizes 360° surround spraying on the glass fiber bundle. The spraying rate and retention rate of the antistatic agent on the glass fiber bundle can even be close to 100%, thereby ensuring that the antistatic agent on the surface of the glass fiber bundle will not be significantly detached during subsequent processing and use, thereby improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the spraying method according to an embodiment of the present invention.

[0022] Figure 2 Schematic cross-sectional view of a pneumatic atomizing nozzle in an embodiment of the present invention.

[0023] Figure 3 It is a cross-sectional view of the assembly of the ejector pin, the nozzle and the air cap in the embodiment of the present invention.

[0024] Figure 4 The figure is a comparison diagram of the effects of the spraying method according to the embodiment of the present invention and the conventional spraying method.

[0025] In the figure: a pneumatic atomizing nozzle 1, a reflector 2, a glass fiber bundle 3; a pin 101, a nozzle 102, an air cap 103, a liquid outlet 104, an air outlet 105, an adjusting end 106, an adjusting chamber 107, a reset chamber 108, and an elastic member 109. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the embodiments and drawings.

[0027] In the embodiment, Figure 1As shown, an embodiment of the present application provides a 360° spraying method of an antistatic agent for glass fiber, wherein the antistatic agent oil mist generated by a pneumatic atomizing nozzle 1 is sprayed from one side of a glass fiber bundle 3, and the antistatic agent oil mist that is not adsorbed is reflected by a reflector 2 and sprayed from the other side of the glass fiber bundle 3, while the glass fiber bundle 3 keeps moving.

[0028] In this embodiment, the following steps are specifically included: Step 1, setting the flow rate of the antistatic agent and the process parameters of the pneumatic atomizing nozzle 1 according to the specifications of the glass fiber bundle 3; Step 2, passing the glass fiber bundle 3 through the spraying action area formed by the pneumatic atomizing nozzle 1 and the radiating member 2; Step 3, simultaneously starting the traction device and the pneumatic atomizing nozzle 1, the traction device drives the glass fiber bundle 3 to move continuously along the axial direction, the pneumatic atomizing nozzle 1 performs spraying, and the reflective member 2 rebounds the antistatic agent oil mist for secondary spraying; Step 4, using the reflective member 2 to collect the antistatic agent that has not been sprayed to the glass fiber bundle 3, and reuse it.

[0029] In this embodiment, the pneumatic atomizing nozzle 1 is used to atomize the antistatic agent and then spray it onto the glass fiber bundle 3, and then the reflector 2 is used to reflect the antistatic agent oil mist that is not adsorbed and then spray it onto the glass fiber bundle 3 for a second time. This method improves the utilization rate of the antistatic agent on the glass fiber bundle, improves the adsorption rate of the antistatic agent, and realizes 360° surround spraying of the glass fiber bundle 3. The spraying rate and retention rate of the glass fiber bundle 3 can even be close to 100%, thereby ensuring that the antistatic agent on the surface of the glass fiber bundle 3 will not be significantly detached during subsequent processing and use, thereby improving product quality.

[0030] In the embodiment, Figure 2 , 3 As shown, since it is necessary to adjust the process parameters of oiling according to the parameters of the glass fiber bundle 3 itself, especially the flow rate of the antistatic agent, the pneumatic atomizing nozzle 1 needs to have good adaptability. Specifically, the ejector pin 101 of the pneumatic atomizing nozzle 1 of this embodiment is set as an axially adjustable structure, so that the size of the liquid outlet 104 formed between the needle tip of the ejector pin 101 and the mouth of the nozzle 102 is adjustable. When the liquid flow rate of the pneumatic atomizing nozzle 1 changes, the size of the liquid outlet 104 is used to keep the atomization range roughly stable, and a good atomization effect can be achieved for antistatic agents with different flow rates, thereby ensuring the spraying rate and retention rate of the antistatic agent.

[0031] In the embodiment, Figure 2 , 3As shown, the regulating end 106 is a piston structure and is equipped with a piston cylinder on the outside. The regulating end 106 divides the piston cylinder into a regulating chamber 107 and a reset chamber 108. The regulating chamber 8 is connected to the regulating air inlet, and an elastic member 109 acting on the regulating end 106 is installed in the reset chamber 108. The regulating end 106 of this embodiment realizes position adjustment under the action of an external air source. A coarse pressure regulating valve and a high-precision pressure regulating valve are provided on the air source pipeline to ensure accurate adjustment of the pressure in the regulating chamber 107, thereby accurately adjusting the size of the liquid outlet 104.

[0032] In the embodiment, Figure 1 As shown, the pneumatic atomizing nozzle 1 is arranged above the glass fiber bundle 3, and the reflector 2 is correspondingly arranged below the glass fiber bundle 3. The reflector 2 adopts a flat bottom trough structure, and the reflector 2 arranged below can also play a role in recovering excess liquid to avoid waste.

[0033] In the embodiment, Figure 1 As shown, the pneumatic atomizing nozzle 1 is tilted toward the advancing direction of the glass fiber bundle 3. The tilted pneumatic atomizing nozzle 1 can obtain a larger spraying range, make the antistatic agent oil mist spray more uniform, and the reflector 2 can also obtain a better reflection effect.

[0034] In order to better illustrate the beneficial technical effects of the 360° spraying method of the glass fiber antistatic agent of the present application, the effects of the glass fiber antistatic agent coating using the method of the present invention and the conventional coating method of the existing antistatic agent (comparative example) are compared below. Among them:

[0035] Example 1: Each glass fiber bundle 3 has 100 to 150 filaments, a filament diameter of 0.07 to 0.10 mm, a moving speed of 5 to 6 m / s, a mass flow rate of the antistatic agent in the pneumatic atomizing nozzle 1 of 1.00 to 3.00 g / min, and a compressed air pressure of 0.15 to 0.25 MPa;

[0036] Embodiment 2: Each glass fiber bundle 3 has 200 to 300 filaments, the diameter of the filaments is 0.07 to 0.10 mm, the moving speed is 5 to 6 m / s, the mass flow rate of the antistatic agent in the pneumatic atomizing nozzle 1 is 3.00 to 4.00 g / min, and the compressed air pressure is 0.15 to 0.25 MPa;

[0037] Embodiment 3: Each glass fiber bundle 3 has 300 to 450 filaments, a filament diameter of 0.07 to 0.10 mm, a moving speed of 5 to 6 m / s, a mass flow rate of the antistatic agent in the pneumatic atomizing nozzle 1 of 4.00 to 5.46 g / min, and a compressed air pressure of 0.15 to 0.20 MPa;

[0038] Comparative Example: A conventional antistatic agent coating process was used.

[0039] like Figure 4 The following are photos comparing the coating effects of products coated with antistatic agents using the comparative example and the methods of Examples 1-3. From left to right, the first one is a glass fiber yarn product coated with a conventional antistatic agent coating process, and the second to fourth ones are glass fiber yarn products coated with the methods of Examples 1-3 of the present invention. Figure 4 It can be seen that the antistatic agent coating method of the present invention can obtain better product quality, the spraying rate and retention rate of the antistatic agent on the glass fiber bundle are high, and the coating is uniform; while the glass fiber yarn product coated by the conventional antistatic agent coating method can be obviously seen to be lighter in color than the glass fiber yarn product of Examples 1-3, that is, the retention rate of the water-based blue antistatic agent on the glass fiber bundle is poor. After testing, the retention rate of the antistatic agent on the glass fiber is only 70-80%, and the antistatic agent has relatively weak adhesion, and is easy to fall off during the later processing.

[0040] Obviously, the above embodiments of the present invention are only examples for explaining the present invention, and are not intended to limit the implementation methods of the present invention. Other obvious changes or modifications derived from the essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A 360° spraying method for glass fiber antistatic agent, characterized in that: The antistatic agent oil mist generated by the pneumatic atomizing nozzle (1) is sprayed from one side of the glass fiber bundle (3), and the antistatic agent oil mist that is not adsorbed is rebounded by the reflector (2) and sprayed from the other side of the glass fiber bundle (3), while the glass fiber bundle (3) keeps moving; The reflector (2) is a flat-bottomed trough structure and is arranged below the glass fiber bundle (3); The pneumatic atomizing nozzle (1) comprises an ejector pin (101) and a nozzle (102). The ejector pin (101) is configured as an axially adjustable structure so that the size of a liquid outlet (104) formed between the needle tip of the ejector pin (101) and the mouth of the nozzle (102) can be adjusted to accommodate an antistatic agent flow rate in the range of 1.00-5.46 g / min.

2. The 360° spraying method of glass fiber antistatic agent according to claim 1, characterized in that Here are the steps: Step 1, setting the flow rate of the antistatic agent and the process parameters of the pneumatic atomizing nozzle (1) according to the specifications of the glass fiber bundle (3); Step 2, passing the glass fiber bundle (3) through a spraying action area formed by a pneumatic atomizing nozzle (1) and a reflector (2); Step 3, simultaneously starting the traction device and the pneumatic atomizing nozzle (1), the traction device drives the glass fiber bundle (3) to move continuously along the axial direction, the pneumatic atomizing nozzle (1) performs spraying, and the reflector (2) rebounds the antistatic agent oil mist for secondary spraying; Step 4: using the reflector (2) to collect the antistatic agent that is not adsorbed onto the glass fiber bundle (3) and recycle it.

3. The 360° spraying method of glass fiber antistatic agent according to claim 1 or 2, characterized in that: Each glass fiber bundle (3) has 100 to 450 filaments, a filament diameter of 0.07 to 0.10 mm, a moving speed of 5 to 6 m / s, a mass flow rate of the antistatic agent in the pneumatic atomizing nozzle (1) of 1.00 to 5.46 g / min, and a compressed air pressure of 0.15 to 0.25 MPa.

4. The 360° spraying method of glass fiber antistatic agent according to claim 1, characterized in that: The pneumatic atomizing nozzle (1) comprises a pin (101), a nozzle (102) and an air cap (103) arranged from the inside to the outside, a liquid outlet (104) is formed between the tip of the pin (101) and the mouth of the nozzle (102), an air outlet (105) is formed between the mouth of the nozzle (102) and the cap opening of the air cap (103), and an adjusting end (106) is provided at the tail of the pin (101), and the adjusting end (106) drives the pin (101) to slide along the axial direction to achieve gap adjustment.

5. The 360° spraying method of glass fiber antistatic agent according to claim 4, characterized in that: The regulating end (106) is a piston structure and is externally equipped with a piston cylinder. The regulating end (106) divides the piston cylinder into a regulating chamber (107) and a reset chamber (108). The regulating chamber (107) is connected to the regulating air inlet. An elastic member (109) that acts on the regulating end (106) is installed in the reset chamber (108).

6. The 360° spraying method of glass fiber antistatic agent according to claim 1, characterized in that: The pneumatic atomizing nozzle (1) is arranged above the glass fiber bundle (3), and the reflector (2) is correspondingly arranged below the glass fiber bundle (3).

7. The 360° spraying method of glass fiber antistatic agent according to claim 1, characterized in that: The pneumatic atomizing nozzle (1) is arranged to be inclined toward the advancing direction of the glass fiber bundle (3).

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