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CN-122014773-A - Composite ceramic-based drum brake pad and preparation method thereof

CN122014773ACN 122014773 ACN122014773 ACN 122014773ACN-122014773-A

Abstract

The invention relates to a preparation method of a composite ceramic-based drum brake pad, which sequentially comprises the following steps of extruding cashew nut shell oil modified phenolic resin through an extruder to obtain a single resin sheet, conveying the single resin sheet on a conveying belt, driving a quantitative cylinder to rotate through a second motor, enabling raw materials in the cylinder to fall into the auger through a through hole, simultaneously driving the auger to rotate by the first motor, mixing the raw materials to obtain a mixed material, driving an opening plate to rotate by the second motor, enabling the mixed material to be scattered onto the resin sheet from a scattering hole, driving a cam to rotate by the first motor, enabling a scattering roller to reciprocate when the mixed material is scattered onto the resin sheet, and pressing the resin sheet through a pressing roller to obtain a friction sheet, and placing a plurality of friction sheets and a backboard in a hot press device for hot press molding.

Inventors

  • Guo Tiewei
  • ZHOU LIHUI
  • WANG XUEZHONG
  • ZHANG XUDONG
  • Kong Dele
  • WANG DEYE
  • KONG DEYI

Assignees

  • 浙江翘楚汽车零部件有限公司

Dates

Publication Date
20260512
Application Date
20260226

Claims (8)

  1. 1. The composite ceramic-based drum brake pad comprises a back plate and a friction material and is characterized by comprising, by mass, 8% -15% of cashew nut shell oil modified phenolic resin, 5% -30% of ceramic fibers, 5% -10% of graphite, 10% -20% of steel fibers, 3% -10% of aluminum oxide, 10% -20% of barium sulfate, 5% -10% of copper powder and 3% -8% of molybdenum disulfide.
  2. 2. A method for preparing the composite ceramic matrix drum brake pad of claim 1, comprising the following steps in order: Extruding cashew nut shell oil modified phenolic resin through an extruder (1) to obtain a single resin tablet, and then conveying the single resin tablet on a conveying belt (2); Step two, a mixing procedure is that a second motor (61) drives a quantitative cylinder (43) to rotate, so that raw materials in a charging cylinder (31) fall into an auger (53) through a through hole (44) and simultaneously a first motor (51) drives the auger (53) to rotate, and the raw materials are mixed to obtain a mixture; Step three, a spreading procedure, in which a second motor (61) drives an opening plate (73) to rotate, so that the mixture is spread onto the resin material sheet from the spreading hole (9); step four, a shaking procedure, namely driving a cam (101) to rotate by a first motor (51), enabling a spreading roller (8) to reciprocate when spreading materials, uniformly spreading the materials on a resin material sheet, and pressing the resin material sheet by a pressing roller (11) to obtain a friction material sheet; And fifthly, a pressing procedure, namely placing the friction material sheets and the backboard into a hot pressing device for hot pressing molding.
  3. 3. The method of manufacturing a composite ceramic-based drum brake pad according to claim 2, wherein in the second step, the second motor (61) drives the quantitative cylinder (43) to rotate while the resin sheet is molded and conveyed, and the through hole (44) is communicated with the blanking pipe (45) so that the raw material in the charging cylinder (31) falls into the quantitative cylinder (43).
  4. 4. The method for preparing the composite ceramic-based drum brake pad according to claim 2, wherein in the second step, after the raw materials fall into the auger (53) through the quantitative cylinder (43), the first motor (51) drives the auger (53) to rotate, and the raw materials are mixed and then conveyed into the spreading roller (8).
  5. 5. The method of manufacturing a composite ceramic-based drum brake pad according to claim 2, wherein in the third step, the second motor (61) drives the opening plate (73) to rotate while the second motor (61) drives the metering cylinder (43) to communicate with the blanking pipe (45), and the raw material is scattered onto the resin material sheet through the scattering hole (9).
  6. 6. The method of manufacturing a composite ceramic-based drum brake pad according to claim 2, wherein in the fourth step, the first motor (51) drives the cam (101) to rotate, the cam (101) drives the extension shaft (105) to reciprocate, and the spreading roller (8) performs small-amplitude reciprocating shaking during spreading, so that raw materials are uniformly spread on the surface of the resin sheet.
  7. 7. The method for manufacturing a composite ceramic-based drum brake pad according to claim 2, wherein in the fourth step, the raw materials are pressed together by a pressing roller (11) after being scattered on the resin sheet, so as to obtain a friction sheet, and the raw materials in the friction sheet reach the standard after repeating the scattering process for several times in the continuous transmission process of the friction sheet.
  8. 8. The method of claim 2, wherein in the fifth step, the plurality of friction plates are stacked after being formed, and the friction plates and the back plate are placed into a pressing machine to be pressed.

Description

Composite ceramic-based drum brake pad and preparation method thereof Technical Field The invention relates to the field of automobile part production, in particular to a composite ceramic-based drum brake pad and a preparation method thereof. Background The brake pad mainly comprises a friction material and a back plate, wherein the friction material mainly comprises a binder, a friction performance regulator, a filler, fibers and the like, the raw materials of the friction material are required to be mixed and then put into a press machine to be pressed together with the back plate, and Chinese patent publication number CN105295838B discloses a drum brake pad friction material and a preparation method of the drum brake pad, wherein the drum brake pad friction material comprises, by weight, 10% -15% of phenolic resin, 6% -12% of glass fibers, 10% -15% of petroleum coke, 10% -20% of mineral fibers, 10% -50% of barium sulfate, 3% -8% of alumina, 5% -10% of artificial graphite, 5% -10% of friction powder and 3% -5% of butyronitrile rubber powder; the drum brake block finished product is prepared by mixing raw materials, hot-press forming, heat treatment, grinding, drilling and printing packaging. Aiming at the defects existing in the prior art, the invention improves the components in the friction material of the brake pad, can correspondingly reduce the hardness while increasing the porosity of the brake pad, and prolongs the service life of the brake pad. However, the inventors found that the friction material is usually mixed by stirring with a stirring drum, and the friction material is not uniformly mixed and is not thoroughly mixed, resulting in low performance of the brake pad. Disclosure of Invention The invention aims at overcoming the defects of the prior art, and provides a composite ceramic-based drum brake pad, which comprises a back plate and a friction plate, wherein the friction plate comprises, by mass, 8% -15% of cashew shell oil modified phenolic resin, 5% -30% of ceramic fibers, 5% -10% of graphite, 10% -20% of steel fibers, 3% -10% of aluminum oxide, 10% -20% of barium sulfate, 5% -10% of copper powder and 3% -8% of molybdenum disulfide. The invention aims at overcoming the defects of the prior art, and also provides a preparation method of the composite ceramic-based drum brake pad, wherein resin is hot-melt extruded to form resin sheets for transmission, raw materials are fully mixed and then scattered on the resin sheets, the resin sheets are pressed, friction sheets are obtained after a plurality of scattering materials and pressing, a plurality of friction sheets and a backboard are sent into a pressing machine for pressing and forming, so that friction materials are mixed more uniformly, and the performance of the brake pad is greatly improved. The technical solution of the invention is as follows: The composite ceramic-based drum brake pad comprises a back plate and a friction plate, wherein the friction plate comprises, by mass, 8% -15% of cashew shell oil modified phenolic resin, 5% -30% of ceramic fibers, 5% -10% of graphite, 10% -20% of steel fibers, 3% -10% of aluminum oxide, 10% -20% of barium sulfate, 5% -10% of copper powder and 3% -8% of molybdenum disulfide. The preparation method of the composite ceramic-based drum brake pad sequentially comprises the following steps: Extruding cashew nut shell oil modified phenolic resin through an extruder to obtain a single resin tablet, and then conveying the single resin tablet on a conveying belt; Step two, a mixing procedure is that a second motor drives a quantitative cylinder to rotate, so that raw materials in the charging cylinder fall into an auger through a port and simultaneously the first motor drives the auger to rotate, and the raw materials are mixed to obtain a mixture; Step three, a spreading procedure, namely, a second motor drives the opening plate to rotate so that the mixture is spread onto the resin material sheet from the spreading hole; step four, a shaking procedure, namely driving a cam to rotate by a first motor, enabling a spreading roller to reciprocate when spreading materials, uniformly spreading the raw materials on a resin material sheet, and pressing the resin material sheet by a pressing roller to obtain a friction material sheet; And fifthly, a pressing procedure, namely placing the friction material sheets and the backboard into a hot pressing device for hot pressing molding. Preferably, in the second step, the second motor drives the quantifying cylinder to rotate while the resin tablet is molded and conveyed, and the through hole is communicated with the blanking pipe, so that the raw material in the charging cylinder falls into the quantifying cylinder. Preferably, in the second step, after the raw materials fall into the auger through the quantifying cylinder, the first motor drives the auger to rotate, and the raw materials are mixed and then conveyed into the spreading roller. In the third st