High-cleanliness ultrasonic edge sealing cotton swab manufacturing process and mold

Abstract

The invention discloses a high-cleanliness ultrasonic edge-sealing cotton swab manufacturing process which comprises the following steps: step 1, in a thousand-level clean room, performing edge pre-pressing and welding on a cotton swab rod and a cotton swab head in an ultrasonic welding manner; 2, in a thousand-grade clean room, the cotton swabs subjected to pre-edge pressing and welding in the step 1 are subjected to secondary edge pressing through ultrasonic waves, and edge sealing and cutting forming of the cotton swabs are completed; 3, the cotton swabs subjected to edge pressing in the step 2 are subjected to cleaning pretreatment in a ten-grade clean room; step 4, cleaning the cotton swabs subjected to the pre-cleaning pretreatment in a tenth-grade clean room; and step 5, drying in a tenth-grade clean room, and packaging. In a thousand-level clean room, the swab blank is pressed by ultrasonic twice, so that the swab blank is soft, smooth, firm and free of burrs. The cotton swabs manufactured by the process can ensure high cleanliness, and when the cotton swabs are used for wiping, scraps do not fall off, and residues do not exist.

Description

Technical Field

[0001] The invention relates to the field of cotton swabs, in particular to a production process and a mold for high-cleanliness ultrasonic edge-sealed cotton swabs. Background Art

[0002] Cotton swabs are a kind of dust-free wiping consumables widely used in optoelectronics, semiconductors, computer hard disks, medical and other industries. They are a kind of wiping cleaning tool designed for cleaning tiny parts in harsh environments. The core quality of cotton swab products is high cleanliness, low dust generation, low residue, and no pollution to the user's environment and products. With the development trend of localization of the electronics industry and the localization of medical devices, the market demand for cotton swab products has increased significantly, and the technical requirements for cotton swab products have become more and more stringent. The common cotton swab products on the market are usually formed by winding cotton heads and hot pressing and sealing processes or viscose processes and hot pressing and sealing processes.

[0003] In the prior art, the edge sealing of cotton swabs is too hard and will scratch the product and drop hair debris during use, polluting the environment and the product, causing the edge sealing to crack and the cleanliness cannot be guaranteed. The service life is short and the usage is increased. Summary of the invention

[0004] In order to overcome the above technical defects, the present invention provides a high-purity ultrasonic edge-sealed cotton swab manufacturing process.

[0005] In order to solve the above problems, the present invention is implemented according to the following technical solutions:

[0006] The technical solution of the present invention is as follows:

[0007] A high-purity ultrasonic edge-sealed cotton swab manufacturing process comprises the following steps:

[0008] Step 1: In a Class 1000 clean room, use ultrasonic welding to pre-press and weld the cotton swab rod and cotton swab head;

[0009] Step 2: In a Class 1000 clean room, the cotton swabs that have been pre-pressed and welded in step 1 are subjected to secondary pressing using ultrasound, and the cotton swabs are edge-sealed and cut into shape;

[0010] Step 3, pre-treating the cotton swab after edge pressing in step 2 in a Class 10 clean room;

[0011] Step 4: Clean the pre-cleaned cotton swab in a Class 10 clean room;

[0012] Step 5: Dry and package in a Class 10 clean room.

[0013] Preferably, in step 1, the cotton swab rod is an environmentally friendly solvent-resistant PP cotton swab rod, and the cotton swab head is a dust-free cloth made of polyester.

[0014] Preferably, in step 3, the cleaning pretreatment step comprises the following steps:

[0015] First, clean the stainless steel clean container with ultrapure water;

[0016] Place the cotton swabs cut in step 2 into a clean stainless steel container and start the soaking process;

[0017] Add the pretreatment solution into a clean stainless steel container, so that the pretreatment solution submerges the surface of the cotton swab, and perform a soaking procedure on the cotton swab;

[0018] After soaking, rinse with deionized water at room temperature.

[0019] Preferably, in the soaking procedure, the cotton swab is kept completely immersed in the pretreatment solution for 40-80 minutes, and is turned over every 10 minutes in the soaking procedure; and the pretreatment solution is an isopropyl alcohol solution.

[0020] Preferably, in step 4, the pre-cleaned and pre-treated cotton swab is cleaned with deionized water.

[0021] Preferably, the resistivity of the deionized water is 17-18.2 milliohms per liter.

[0022] Preferably, in step 5, the cleaned cotton swab is placed in a dryer for drying at a temperature of 70° C.-110° C. for 2-3 hours.

[0023] Preferably, the Class 1000 clean room has a temperature of 18°C-28°C, a humidity of 40%-85%, and a concentration of solid particles in the air with a diameter of 0.5 microns and above and a particle concentration of no more than 35,000 particles / m 3 ;

[0024] The Class 10 clean room has a temperature of 20℃-25℃, a humidity of 30%-70%, and a concentration of solid particles in the air with a diameter of 0.5 microns and a particle concentration of no more than 350 particles / m 3 .

[0025] The second aspect of the present invention provides a mold for the high-cleanliness ultrasonic edge-sealing cotton swab manufacturing process as described in the first aspect of the embodiment, characterized in that the mold comprises:

[0026] A first mold, the first mold is used in step 1, the first mold is provided with a three-layer structure, and the edge pressing width of the first mold is 0.4 mm;

[0027] A second mold, the second mold is used in step 2, the edge width of the second mold is 0.25 mm, and the cutting edge width of the second mold is controlled at 0.1 mm;

[0028] The total width of the edge pressing edge of the second mold and the cutting edge of the second mold is 0.4 mm, and the edge pressing edge of the second mold and the cutting edge of the second mold form a conical angle of about 20°.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a high-cleanliness ultrasonic edge-sealed cotton swab manufacturing process, in a Class 1000 clean room, ultrasonic pressing and welding equipment is used to press the edge twice, so that the cotton swab edge is complete and continuous, the pressed edge is soft, smooth, firm and has no burrs. In a Class 10 clean room, the cotton swab is soaked in an isopropyl alcohol solution and washed with deionized water, and finally dried. The cotton swabs made using this process can ensure high cleanliness, and no scraps or residues will fall off when the cotton swabs are used for wiping. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

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

[0032] Figure 2 It is a finished product schematic diagram of a high-cleanliness ultrasonic edge-sealed cotton swab of the present invention;

[0033] In the figure: S10-step 1, S20-step 2, S30-step 3, S40-step 4, S50-step 5, 1-cotton swab rod, 2-cotton swab head. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0035] like Figure 1-Figure 2 As shown, the high-cleanliness ultrasonic edge-sealed cotton swab manufacturing process described in the present invention comprises the following steps:

[0036] Step 1: In a Class 1000 clean room (ISO Class 6), use ultrasonic welding to pre-press and weld the cotton swab rod 1 and the cotton swab head 2;

[0037] Step 2: In a Class 1000 clean room (ISO Class 6), the cotton swab that has been pre-pressed and welded in step 1 is subjected to secondary pressing using ultrasound, and the cotton swab is edge-sealed and cut into shape;

[0038] Step 3, the cotton swab after edge pressing in step 2 is subjected to clean pretreatment in a Class 10 clean room (ISO Class 4);

[0039] Step 4, cleaning the pre-cleaned cotton swab in a Class 10 clean room (ISO Class 4);

[0040] Step 5: Dry and package in a Class 10 clean room (ISO Class 4).

[0041] Furthermore, the cotton swab rod 1 is an environmentally friendly solvent-resistant PP cotton swab rod, and the material of the cotton swab head 2 is a polyester dust-free cloth.

[0042] In one embodiment, an environmentally friendly solvent-resistant PP cotton swab rod and a dust-free cloth made of high-purity polyester material are placed in the first mold, and ultrasonic welding equipment is used for welding. The high-frequency mechanical vibration friction and pressure of the ultrasonic wave melt the surface of the upper and lower cotton swab heads 2 and firmly weld and bond together to form a complete edge seal and the shape of the cotton swab head 2, and at the same time, the cotton swab head 2 and the cotton swab rod 1 at the neck position of the cotton swab rod 1 are firmly welded and bonded together. In this embodiment, ultrasonic pressing welding equipment is used for pre-pressing and welding, and the ultrasonic frequency is 20KHZ. The strict flatness and precision in the mold of the ultrasonic welding equipment are one of the keys to ensure the integrity and firmness of the cotton swab edge seal.

[0043] In one embodiment, the cotton swab that has been pre-pressed and welded in step 1 is placed in a second mold, and the cotton swab that has been pre-pressed and welded in step 1 is pressed for a second time through the high-frequency mechanical vibration friction and pressure of ultrasound and the sharp blade of ultrasound, and the ultrasound waves are emitted instantly to perform edge cutting and edge sealing.

[0044] Further, in step 3, the cleaning pretreatment includes the following steps:

[0045] First, clean the stainless steel clean container with ultrapure water;

[0046] Place the cotton swabs cut in step 2 into a clean stainless steel container and start the soaking process;

[0047] Add the pretreatment solution into a clean stainless steel container, so that the pretreatment solution submerges the surface of the cotton swab, and perform a soaking procedure on the cotton swab;

[0048] After soaking, rinse with deionized water at room temperature.

[0049] It is understandable that a pretreatment solution is added to the clean stainless steel clean container. The pretreatment solution is an isopropyl alcohol solution. Isopropyl alcohol has excellent dissolving ability and can effectively dissolve various organic and inorganic substances. In this embodiment, an isopropyl alcohol solution is used as the pretreatment solution of step 3, which can effectively dissolve various organic and inorganic substances on the cotton swab.

[0050] Furthermore, the cotton swab is kept completely immersed in the pretreatment solution for 40-80 minutes during the immersion process, and is turned over every 10 minutes during the immersion process.

[0051] In one embodiment, the cotton swab is completely immersed in the isopropyl alcohol solution for 40 minutes, and the cotton swab is turned over every 10 minutes during the immersion process. After the immersion process is completed, the cotton swab is rinsed twice with deionized room temperature water to reduce the residue, grease and oligomers in the cotton swab head 2 and improve the cleanliness.

[0052] In one embodiment, the pre-cleaned cotton swab is further cleaned with deionized water. The resistivity of the deionized water is 17.6 milliohms per liter. The cotton swab is purified and cleaned to remove particles, impurities, etc. on the surface of the cotton swab and improve the cleanliness.

[0053] In step 5, the cleaned cotton swab is placed in a dryer for drying at a temperature of 70° C. to 110° C. for 2 to 3 hours.

[0054] In one embodiment, the cotton swab treated in step 4 is drained and placed in a dryer, and the temperature of the dryer is adjusted to 95° C. and the drying time is adjusted to 2 hours.

[0055] Optionally, the Class 1000 clean room has a temperature of 18°C-28°C, a humidity of 40%-85%, and a concentration of solid particles in the air with a diameter of 0.5 microns and above, and the concentration of particles does not exceed 35,000 particles / m 3 ;

[0056] The temperature of the Class 10 clean room is 20℃-25℃, the humidity is 30%-70%, and the concentration of solid particles in the air is no more than 350 particles / m 3 .

[0057] In one embodiment, the Class 1000 clean room has a temperature of 23°C, a humidity of 51%, and a concentration of solid particles in the air with a diameter of 0.5 microns or more and a concentration of particles not exceeding 35,000 particles / m 3 ;

[0058] The temperature of the Class 10 clean room is 23°C, the humidity is 46%, the concentration of solid particles in the air is greater than or equal to 0.5 microns, and the concentration of particles does not exceed 350 particles / m 3 .

[0059] The second aspect of the present invention provides a mold for the high-cleanliness ultrasonic edge-sealing cotton swab manufacturing process as described in the first aspect of the embodiment, characterized in that the mold comprises: a first mold and a second mold;

[0060] The first mold is used in step 1. The first mold has a three-layer structure. The cotton swab rod 1 is placed in the middle layer of the first mold. A layer of cotton swab head 2 is placed on the upper and lower layers. The edge width of the first mold is 0.4 mm.

[0061] It is understandable that the material of the cotton swab rod 1 and the material of the cotton swab head 2 are placed in the first mold, and pre-pressing and welding are performed using a press edge with a width of 0.4 mm.

[0062] The second mold is used in step 2, the edge pressing blade width of the second mold is 0.25mm, and the cutting blade width of the second mold is controlled at 0.1mm; the total width of the edge pressing blade of the second mold and the cutting blade of the second mold is 0.4mm, and the edge pressing blade of the second mold and the cutting blade of the second mold form a conical angle of about 20°.

[0063] It is understandable that the cotton swab that has been pre-pressed and welded in step 1 is placed in the second mold for secondary pressing and cutting. The pressing edge width of the second mold is 0.25 mm, the cutting edge width of the second mold is controlled at 0.1 mm, the total width of the pressing edge of the second mold and the cutting edge of the second mold is 0.4 mm, and the pressing edge of the second mold and the cutting edge are at a conical angle of about 20°. The pressing edge of the second mold and the cutting edge are set at a conical angle of about 20°, so that the thickness of the cotton swab head 2 from the inner pressing edge of the cotton swab rod 1 to the outer cutting edge is gradually thinned, so as to achieve the edge sealing integrity, firmness and cleanliness of the edge of the cotton swab head 2.

[0064] The working principle of the high-cleanliness ultrasonic edge-sealed cotton swab manufacturing process described in the present invention is:

[0065] Step 1: In a Class 1000 clean room, use ultrasonic welding to pre-press and weld the cotton swab rod 1 and the cotton swab head 2;

[0066] Step 2: In a Class 1000 clean room, the cotton swabs that have been pre-pressed and welded in step 1 are subjected to secondary pressing using ultrasound, and the cotton swabs are edge-sealed and cut into shape;

[0067] Step 3, the cotton swab formed by edge pressing in step 2 is subjected to clean pretreatment in a Class 10 clean room, and the clean pretreatment includes the following steps: first, the stainless steel clean container is cleaned with ultrapure water; then, the cotton swab cut in step 2 is placed in the stainless steel clean container; and isopropyl alcohol solution is added to the stainless steel clean container so that the isopropyl alcohol solution submerges the surface of the cotton swab;

[0068] After soaking in isopropyl alcohol solution, rinse with deionized water at room temperature to reduce the internal residue, grease and oligomers in the cotton swab head 2 and improve the cleanliness.

[0069] Step 4: Clean the pre-cleaned cotton swab in a Class 10 clean room; and further clean the pre-cleaned cotton swab with deionized water.

[0070] Step 5: Dry and package in a Class 10 clean room; drain the cotton swabs treated in step 4 and put them into a dryer for drying. After drying, use a purification bag for exhaust and double-layer sealed packaging.

[0071]

[0072]

[0073] Table 1

[0074] As shown in Table 1, the traditional cotton swabs were tested and compared with the cotton swabs of the present application process. The above scheme forms a high-cleanliness cotton swab with complete and continuous edge sealing, soft and smooth pressed edge, firm and burr-free, no fogging and no residue after wiping. The cotton swab can meet the product use of customers in industries with high and low requirements, and it can also replace the application of traditional cotton swabs.

[0075] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A high-purity ultrasonic edge-sealed cotton swab production process, characterized in that: The following steps are involved: Step 1: In a Class 1000 clean room, use ultrasonic welding to pre-press and weld the cotton swab rod and cotton swab head; Step 2: In a Class 1000 clean room, the cotton swabs that have been pre-pressed and welded in step 1 are subjected to secondary pressing using ultrasound, and the cotton swabs are edge-sealed and cut into shape; Step 3, pre-treating the cotton swab after edge pressing in step 2 in a Class 10 clean room; Step 4: Clean the pre-cleaned cotton swab in a Class 10 clean room; Step 5: Dry and package in a Class 10 clean room.

2. The high-cleanliness ultrasonic edge-sealed cotton swab manufacturing process according to claim 1 is characterized in that: In step 1, the cotton swab rod is an environmentally friendly solvent-resistant PP cotton swab rod, and the cotton swab head is a dust-free cloth made of polyester.

3. The high-cleanliness ultrasonic edge-sealed cotton swab manufacturing process according to claim 1 is characterized in that: In step 3, the cleaning pretreatment includes the following steps: First, clean the stainless steel clean container with ultrapure water; Place the cotton swabs cut in step 2 into a clean stainless steel container and start the soaking process; Add the pretreatment solution into a clean stainless steel container, so that the pretreatment solution submerges the surface of the cotton swab, and perform a soaking procedure on the cotton swab; After soaking, rinse with deionized water at room temperature.

4. The high-cleanliness ultrasonic edge-sealing cotton swab manufacturing process according to claim 3 is characterized in that: In the soaking procedure, the cotton swab is kept completely immersed in the pretreatment solution for 40-80 minutes, and is turned over every 10 minutes in the soaking procedure; the pretreatment solution is an isopropyl alcohol solution.

5. The high-cleanliness ultrasonic edge-sealing cotton swab manufacturing process according to claim 1, characterized in that: In step 4, the pre-cleaned and pre-treated cotton swab is cleaned with deionized water.

6. The high-cleanliness ultrasonic edge-sealing cotton swab manufacturing process according to claim 5, characterized in that: The resistivity of the deionized water is 17-18.2 milliohms per liter.

7. The high-cleanliness ultrasonic edge-sealed cotton swab manufacturing process according to claim 1, characterized in that: In step 5, the cleaned cotton swab is placed in a dryer for drying at a temperature of 70° C. to 110° C. for 2 to 3 hours.

8. The high-cleanliness ultrasonic edge-sealed cotton swab manufacturing process according to claim 1, characterized in that: The Class 1000 clean room has a temperature of 18°C-28°C, a humidity of 40%-85%, and a concentration of solid particles in the air with a diameter of 0.5 microns and above, which does not exceed 35,000 particles / m 3 ; The Class 10 clean room has a temperature of 20℃-25℃, a humidity of 30%-70%, and a concentration of solid particles in the air with a diameter of 0.5 microns and a particle concentration of no more than 350 particles / m 3 .

9. A mold for the production process of a high-cleanliness ultrasonic edge-sealed cotton swab according to any one of claims 1 to 8, characterized in that: The mold comprises: A first mold, the first mold is used in step 1, the first mold is provided with a three-layer structure, and the edge pressing width of the first mold is 0.4 mm; A second mold, the second mold is used in step 2, the edge width of the second mold is 0.25 mm, and the cutting edge width of the second mold is controlled at 0.1 mm; The total width of the edge pressing edge of the second mold and the cutting edge of the second mold is 0.4 mm, and the edge pressing edge of the second mold and the cutting edge of the second mold form a conical angle of about 20°.

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