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CN-116901495-B - Manufacturing method of scraping plate

CN116901495BCN 116901495 BCN116901495 BCN 116901495BCN-116901495-B

Abstract

The invention belongs to the technical field of forming of laser image office equipment parts, and particularly relates to a manufacturing method of a scraping plate. The manufacturing method of the scraper blade comprises the following steps of S1 film forming, S2 film taking out, cleaning, removing impurities and release agents on the surface of the film to obtain a cleaning film, S3 preparing coating according to formula requirements, S4 uniformly coating the coating prepared in the step S3 on the working position of the cleaning film obtained in the step S2 to obtain a coated product, S5 drying the coated product obtained in the step S4 to obtain a solidified substance, cutting or slitting the solidified substance, and S6 adhering the solidified substance cut or slit in the step S5 on a metal bracket. According to the manufacturing method of the scraping plate, the functional coating is coated on the film after the PU film is molded, so that the manufactured product is high in qualification rate and universality, the research and development cost is reduced, and the functionality of the product is increased.

Inventors

  • WANG BINGREN

Assignees

  • 珠海优泰科技有限公司

Dates

Publication Date
20260505
Application Date
20230713

Claims (8)

  1. 1. A method of manufacturing a squeegee, comprising the steps of: s1, film forming, namely uniformly mixing PU materials, pouring the PU materials into a centrifugal machine or a die with a bracket, and heating, solidifying and forming; s2, taking out the film from the centrifugal machine or taking out the film with the bracket from the die, cleaning, and removing impurities and release agent on the surface of the film to obtain a clean film; S3, preparing a coating according to the formula requirement, wherein the weight ratio of the coating to the PU material in the step S1 is 0.5-10:85-98; S4, uniformly coating the coating prepared in the step S3 on the working position of the cleaning film obtained in the step S2 to obtain a coated product; S5, placing the coated product obtained in the step S4 into a baking oven at 100-150 ℃ for drying for 10-30 minutes to obtain a cured product, and cutting or slitting the cured product; S6, sticking the solidified product cut or slit in the step S5 on a metal bracket; The PU material in the step S1 comprises the following components, by weight, 65-95% of polyurethane prepolymer, 0-30% of polyester polyol resin, 5-12% of curing agent, 0-5% of conductive agent and 0-5% of lubricant; The coating in the step S3 comprises, by weight, 54.97-65.49% of deionized water, 25-30% of abrasive particles, 2-3% of polycarboxylate dispersant, 5-8% of polyvinyl alcohol, 2-3% of thickener, 0.5-1% of attapulgite and 0.01-0.03% of defoamer.
  2. 2. The method of manufacturing a squeegee according to claim 1, wherein the weight ratio of the paint in the step S3 to the PU material in the step S1 is (1-5) to (95-98).
  3. 3. The method of manufacturing a squeegee according to claim 1, wherein the step S4 is applied by spraying, dipping or brushing.
  4. 4. The method for manufacturing a squeegee according to claim 1, wherein the step S5 is to dry the coated product obtained in the step S4 in an oven at 110 to 130 ℃ for 15 to 25 minutes.
  5. 5. The method for manufacturing a squeegee according to claim 1, wherein the PU material of step S1 is composed of, by weight, 70% of a polyurethane prepolymer, 20% of a polyester polyol resin, 6% of a curing agent, 2% of a conductive agent and 2% of a lubricant.
  6. 6. The method of producing a squeegee according to claim 1, wherein the curing agent is 1, 3-propanediol, 1, 4-butanediol, trimethylolpropane, trimethylolethane or a mixture thereof, the conductive agent is silver powder, zinc oxide or tin oxide, and the lubricant is molybdenum disulfide or silicon dioxide.
  7. 7. The method of manufacturing a squeegee according to claim 1, wherein the paint in step S3 is composed of, by weight, 59.48% of deionized water, 28% of abrasive particles, 2.5% of polycarboxylate dispersant, 7% of polyvinyl alcohol, 2.2% of thickener, 0.8% of attapulgite, and 0.02% of defoamer.
  8. 8. The method of producing a blade according to claim 1, wherein the abrasive particles are one or more of silica, alumina and carbon black, the abrasive particles have a particle diameter of 200nm to 20. Mu.m, the thickener is hydroxyethyl cellulose, and the antifoaming agent is isooctyl alcohol.

Description

Manufacturing method of scraping plate Technical Field The invention belongs to the technical field of forming of laser image office equipment parts, and particularly relates to a manufacturing method of a scraping plate. Background The blade of the laser image office equipment functions to clean the residual developer on the surface of the developer (photosensitive drum, etc.), or to control the thickness and uniformity of the upper developer layer of the developer and the frictional electrification amount. The scraping plate is generally formed by compounding a metal bracket and a single-layer PU film. Chinese patent application CN100480890a discloses a cleaning blade element containing a polyurethane formed by using a polyol comprising at least one polyester polyol, a caprolactone-based diol and a polycarbonate diol, wherein the polyester polyol is obtained by dehydration condensation of adipic acid and a diol component, a polyisocyanate, and a crosslinking agent comprising a short chain diol and a triol having a molecular weight of 120-2,500, wherein the short chain diol is at least one of propylene glycol and butylene glycol, and wherein the polyurethane has a peak temperature of loss tangent (1 Hz) of 0 ℃ or less. Chinese patent application CN102467059a discloses a cleaning blade, which is used in an image forming apparatus using an electrostatic transfer process, and has a polyurethane elastomer prepared by reacting an isocyanate group-containing pseudo prepolymer prepared by reacting a diisocyanate compound with a polycaprolactone diol (P1) having a number average molecular weight (Mw) of 2000 to 4000, a polyol compound prepared by mixing at least the polycaprolactone diol (P1) with a polycaprolactone diol (P2) having a number average molecular weight (Mw) of 500 to 1000, and a curing agent component, and the number average molecular weight (Mw) after mixing is 1500 to 1950. The common PU film can only determine the cleaning capability or the control capability of the thickness, the uniformity and the charge quantity of the developer through the performance of the material of the common PU film. The surface properties of the PU film are difficult to adjust due to the restrictions of the raw materials and the molding process. At present, the requirements of various selenium drums on the market on scraping plates are different, so that the universality of products is poor, and the development and matching of manufacturers are difficult. Especially, the current laser image office equipment shows the development trend of miniaturization, high speed and long service life, and the adaptability requirement on the scraping plate is higher and higher. Disclosure of Invention In view of the shortcomings of the prior art, an object of the present invention is to provide a method for manufacturing a squeegee. According to the manufacturing method of the scraping plate, after the PU film is molded, a layer of uniform functional coating is added on one side or two sides of the film, so that the manufactured product is high in qualification rate and strong in universality, the research and development cost is reduced, and meanwhile, the functionality of the product is increased, so that the product has good conductivity, wear resistance and lubricity. The technical scheme adopted by the invention for solving the technical problems is as follows: a method of manufacturing a squeegee comprising the steps of: s1, film forming, namely uniformly mixing PU materials, pouring the PU materials into a centrifugal machine or a die with a bracket, and heating, solidifying and forming; s2, taking out the film from the centrifugal machine or taking out the film with the bracket from the die, cleaning, and removing impurities and release agent on the surface of the film to obtain a clean film; S3, preparing a coating according to the formula requirement, wherein the weight ratio of the coating to the PU material in the step S1 is 0.5-10:85-98; S4, uniformly coating the coating prepared in the step S3 on the working position of the cleaning film obtained in the step S2 to obtain a coated product; S5, placing the coated product obtained in the step S4 into a baking oven at 100-150 ℃ for drying for 10-30 minutes to obtain a cured product, and cutting or slitting the cured product; s6, adhering the solidified product cut or split in the step S5 to a metal bracket. Further, the weight ratio of the paint in the step S3 to the PU material in the step S1 is (1-5) to (95-98). Further, the weight ratio of the paint in the step S3 to the PU material in the step S1 is 2:98. Further, the coating mode in the step S4 is spray coating, dip coating or brush coating. Further, the step S5 is to put the coated product obtained in the step S4 into an oven at 110-130 ℃ for drying. Further, the drying time in the step S5 is 15-25 minutes. Further, the PU material in the step S1 comprises 65-95% of polyurethane prepolymer, 0-30% of polyester polyol re