WO2008156235A1 - Moule permettant de fabriquer une meule à tronçonner - Google Patents

Moule permettant de fabriquer une meule à tronçonner Download PDF

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Publication number
WO2008156235A1
WO2008156235A1 PCT/KR2007/005934 KR2007005934W WO2008156235A1 WO 2008156235 A1 WO2008156235 A1 WO 2008156235A1 KR 2007005934 W KR2007005934 W KR 2007005934W WO 2008156235 A1 WO2008156235 A1 WO 2008156235A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
cutting wheel
pressure
manufacturing
molding
Prior art date
Application number
PCT/KR2007/005934
Other languages
English (en)
Inventor
Yoo-Hong So
Original Assignee
D & D Disc Industry Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by D & D Disc Industry Corp. filed Critical D & D Disc Industry Corp.
Publication of WO2008156235A1 publication Critical patent/WO2008156235A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B28B3/024—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form the pressure on the material being transmitted through flexible or resilient wall parts, e.g. flexible cushions on the ramming surface, resilient wall parts pressing as a result of deformation caused by ram pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/02—Circular saw blades
    • B23D61/028—Circular saw blades of special material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
    • B28B1/081—Vibration-absorbing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B28B3/025—Hot pressing, e.g. of ceramic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0097—Press moulds; Press-mould and press-ram assemblies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/06—Moulds with flexible parts

Definitions

  • the present invention relates to a mold for manufacturing a cutting wheel, more specifically to a mold for manufacturing a cutting wheel, whereby ceramic powder mixture and core material, which are main materials of the cutting wheel, are put into the mold together and heated and pressed to form into a disk shape with the molding density made more uniform so as to manufacture a cutting wheel of better quality.
  • a cutting wheel 10 refers to a disk-shaped wheel having a mounting hole at the center 10a, as shown in Fig. 6. If the cutting wheel is mounted on a tool such as a hand grinder, for example, and is rotated, so it can be used to cut or grind various materials by the cutting force of its circumference.
  • FIG. 7 A conventional process for manufacturing a cutting wheel will be described. As shown in Fig. 7, after preparing ceramic mixture 11, glass fiber core material 12 and non- woven fabric 90, the ceramic mixture 11 and the core material 12 are put into separate molds 20a and 20b, which make the cutting wheel shape into a circle, and heated and compressed under predetermined conditions.
  • the heating and compressing processes are carried out under predetermined conditions of about 20 to 40 ° C at a pressure of about 60 to 90 kg/cm 2 , for example.
  • a plurality of cutting wheels formed like this are stacked in a lump and put in a sintering furnace (electric furnace) to be sintered for a given time under conditions of about 180 0 C at a pressure of about 2 kg/cm 2 , and then cooled to be finished.
  • Fig. 8 is not provided with a separate means for evenly spreading the mixture, the mixture 11 is not distributed sufficiently uniformly even if spread while rotating the lower mold 20a, so even if the upper mold 20b is put in place, the thickness of the cutting wheel is not uniform.
  • the cutting wheel 10 manufactured as described above generates vibration in the direction of disk thickness when it is mounted and rotated on a cutting tool. Due to such vibration, it has disadvantages that the life of cutting wheel is shortened, dust is excessively generated, and the cut surface is relatively rough. [9] Since such a cutting wheel is a cutting tool, it is natural that the edge portion of the circumference is rough, but that the thickness of the disk is not uniform needs to be improved.
  • a pressure-molding unit 30 is formed on the top surface inserted onto the pole 22 of the lower mold 20a and on the bottom surface of the upper mold 20b on which a through hole 23 inserted onto the pole 22 is formed, so that powder material that is on the bottom of the mold body or under the mold cover can be pressed uniformly.
  • Such a conventional pressure-molding unit 30 has protuberances 32 formed in concentric circles, so if a cutting wheel 10 made by using the pressure-molding unit 30 provided with such protuberances of concentric circles is mounted and rotated on a cutting tool, vibration is generated in the direction of disk thickness. Due to this vibration, the life of the cutting wheel is shortened, dust is excessively generated, the cut surface is relatively rough, and the thickness of the disk is not uniform, so the drawback of sintering force being lowered still needs improvement.
  • the present invention is to solve such conventional problems as described above with an object to provide a mold for manufacturing a cutting wheel, in which main material ceramic powder mixture and core material are put into a mold together to be heated and pressed to form into a disk shape, the molding density is made as uniform as possible, so that the binding force of the main raw materials of ceramic and resin is enhanced to prolong the life of the cutting wheel, and also, when the cutting wheel is mounted on a hand grinder, the shortening of the life due to the vibration and generation of excessive dust are prevented for the accomplishment of more precise cutting.
  • a mold for manufacturing a cutting wheel comprising a mold body having a concave inner space for containing materials for manufacturing the cutting wheel, a mold cover for covering over the inner space of said mold body, and a pressure-molding unit for uniformly pressing powder material on the bottom of said mold body or the bottom surface of said mold cover, wherein said pressure-molding unit is formed across the whole area of the bottom of said mold body or the bottom surface said mold cover and is made of wire mesh material.
  • the wire mesh material of said pressure-molding unit has a resin disk provided on its one surface in order to absorb shock and increase the life of components.
  • a mold for manufacturing a cutting wheel comprising a pressure-molding unit which is formed to uniformly press powder material on the top surface of the lower mold or the bottom surface of the upper mold for containing and molding the materials for manufacturing the cutting wheel, wherein said pressure-molding units are formed on the top surface of the lower mold or the bottom surface of the upper mold and are made of wire mesh materials.
  • said mold comprises a mold base provided with a circular inner space for containing materials in which said lower mold and upper mold are inserted; a lower mold which is inserted in said inner space, and on the top surface of which is formed said pressure-molding unit, and at the center of which is formed a through hole; a pole which is detachably inserted into the through hole of said lower mold so as to be protruded upward to a given length; and an upper mold which is inserted in said inner space and on the bottom of which is formed said pressure-molding unit and at the center of which is formed a through hole into which said pole is detachably inserted.
  • the wire mesh material of said pressure-molding units has an elastic plate provided on its one surface in order to absorb shock and increase the life of components.
  • a hole of a given diameter is formed at the center of said pole and its top end portion has a taper shape with the outer diameter becoming smaller as it goes upward so as to be easily inserted into the through hole of said lower mold and the through hole of said upper mold.
  • the pressure-molding unit for pressing the powder material uniformly is formed on the top surface of the lower mold or the bottom surface of the upper mold for containing and forming the materials to manufacture the cutting wheel, and this pressure-molding unit is made of wire mesh material, so it is possible to produce a cutting wheel of uniform density by providing a uniform compression force during molding for manufacturing the cutting wheel.
  • an elastic plate is provided between the wire mesh material of the pressure- molding unit and the upper mold and between the wire mesh material and the lower mold, so shock can be absorbed and the life of the elastic plate can be increased.
  • the structure is such that the lower mold and upper mold are extracted from the inner space of the mold base, and the pole is extracted from the center of the lower mold and upper mold, so it is very easy to separate the cutting wheel after molding.
  • a hole is formed at the center of the pole axis, so if the mold is rotated by inserting a tool into the hole, there is an effect that the ceramic is spread to a uniform thickness.
  • FIG. 1 is an exploded perspective view showing a mold for manufacturing a cutting wheel according to an embodiment of the present invention
  • FIG. 2 is a sectional view showing the state of assembly of Fig. 1;
  • FIG. 3 is an exploded perspective view showing a mold for manufacturing a cutting wheel according to another embodiment of the present invention.
  • FIG. 4 is a sectional view showing the state of assembly of Fig. 3;
  • FIG. 5 is a schematic sectional view for describing the method of manufacturing a cutting wheel according to another embodiment of the present invention.
  • FIG. 6 is a perspective view showing a cutting wheel molded by using core material in general
  • FIG. 7 is a schematic drawing for describing the state of manufacturing a cutting wheel by using a conventional mold for manufacturing a cutting wheel
  • Fig. 8 is an exploded perspective view illustrating an example of a conventional mold for manufacturing a cutting wheel.
  • Fig. 9 is an exploded perspective view illustrating another example of a conventional mold for manufacturing a cutting wheel.
  • Fig. 1 is an exploded perspective view showing a mold for manufacturing a cutting wheel according an embodiment of the present invention
  • Fig. 2 is a sectional view for describing the state of assembly of Fig. 1.
  • the portions identical with Fig. 6 and Fig. 7 for describing the prior art have identical reference symbols so description will be omitted.
  • a mold for manufacturing a cutting wheel comprises a mold body 20a having an inner space 21 for containing materials and a mold cover 20b for covering the inner space of the mold body 20a.
  • a pole 22 At the center of the bottom of the mold body 20a is formed a pole 22, and at the center of the mold cover 20b is formed a through hole 23.
  • the present invention is characterized in that the pressure-molding unit
  • the pressure-molding unit 30 is provided with a wire mesh material 31 as shown in Fig. 1.
  • the mold 20 for manufacturing a cutting wheel comprises a mold body 20a having a concave inner space 21 for containing materials for manufacturing the cutting wheel 10 and a mold cover 20b for covering the inner space of the mold body 20a.
  • a pressure-molding unit 30 for pressing the powder material uniformly is formed on the bottom of the mold body 20a or the bottom surface of the mold cover 20b.
  • This pressure-molding unit 30 is characterized in that it is made of a wire mesh material 31 that is formed across the whole area on the bottom of the mold body 20a or the bottom surface of the mold cover 20b.
  • the wire mesh material 31 of the pressure-molding unit 30 is characterized in that one surface thereof is provided with an elastic plate 33 so as to absorb shock and increase the life of components.
  • a wire mesh material 31 is covered across the whole area on the bottom of the mold body 20a or the bottom surface of the mold cover 20b.
  • the tip of the edge of the wire mesh is buried in an insert slot 31a for finishing that is defined by the side surface of the elastic plate 33 and the inner walls of the mold body or the mold cover.
  • Figs. 3 to 5 are drawings illustrating another embodiment of the present invention.
  • the pressure-molding unit for uniformly pressing powder material is formed on the top surface of the lower mold or the bottom of the upper mold for containing and molding the materials for manufacturing the cutting wheel 10.
  • the pressure-molding units 121 and 141 are characterized in that they are formed on the top surface of the lower mold or the bottom of the lower mold and are made of wire mesh materials 121a and 141a.
  • both of the lower mold 120 and upper mold 140 composing the mold for manufacturing a cutting wheel 10 are provided with wire mesh materials 121a and 141a of the pressure-molding unit 121 and 141, and this structure belongs to the scope of the present invention.
  • the mold 100 comprises, as shown in Fig. 3, a mold base 110 provided with a circular inner space 111 into which the lower mold 120 and the upper mold 140 are inserted; a lower mold 120 which is inserted into the inner space 111 and on the top surface of which is formed a pressure-molding unit 121, and at the center of which is formed a through hole 122; a pole 130 which is detachably inserted into the through hole of the lower mold so as to be protruded upward to a given length; and an upper mold 140 at the center of which is formed a through hole 142 into which the pole 130 is detachably inserted.
  • the mold base 110 is made in a circular ring shape, but it may have various shapes such as a square shape. But considering workability, a circular ring shape is preferable.
  • the wire mesh materials 121a and 141a of the pressure-molding units 121 and 141 have a characteristic that they have an elastic plate (resin disk: 150) of synthetic resin, rubber, urethane, etc. provided on one surface thereof so as to impart elastic force to the wire mesh material, in order to absorb shock and increase the life of components.
  • an elastic plate resin disk: 150
  • the elastic plate 150 prevents or delays the pressure- molding units 121 and 141 of the wire mesh materials 121a and 141a from being damaged by shock or easily becoming unusable.
  • a hole 131 of a given diameter is formed at the center of the pole 130, and its top end portion has a taper shape with the outer diameter becoming smaller as it goes upward so as to be easily inserted into the upper and lower though holes 122 and 142 of the lower mold 120 and upper mold 140.
  • the upper mold 140 is inserted on the pole 130, and the upper mold 140 and the lower mold 120 are heated and respectively pressed downwards and upwards for a given time, then they are pressed by the pressure-molding units 121 and 141 made of wire mesh material 121a and 141a to make dense pressure molding.
  • the pressure-molding unit for pressing the powder material uniformly is formed on the top surface of the lower mold or the bottom surface of the upper mold for containing and forming the materials to manufacture the cutting wheel, and this pressure-molding unit is made of wire mesh material, so it is possible to produce a cutting wheel of uniform density by providing a uniform compression force during molding for manufacturing the cutting wheel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

La présente invention concerne un moule permettant de fabriquer une meule à tronçonner. Ce moule permettant de fabriquer une meule à tronçonner peut être utilisé pour mouler une meule à tronçonner en forme de disque en mettant dans le moule le mélange de poudre de céramique principal et le matériau de noyau, puis en chauffant et en comprimant, il prolonge la durée de vie de la meule à tronçonner en rendant la densité de moulage aussi uniforme que possible pour améliorer la force de liaison de la céramique principale et de la résine, et empêche ainsi le raccourcissement de la durée de vie et la génération excessive de poussière due à un phénomène de vibration lorsqu'une meule à tronçonner est montée sur une meuleuse portative et mise en rotation, et permet une découpe plus précise. Le moule permettant de fabriquer une meule à tronçonner de la présente invention comprend une unité de moulage par pression qui est formée pour comprimer de manière uniforme un matériau en poudre sur la surface supérieure du moule inférieur ou la surface inférieure du moule supérieur pour contenir et mouler les matériaux destinés à la fabrication de la meule à tronçonner, lesdites unités de moulage par pression (121) et (141) étant formées sur la surface supérieure du moule inférieur (120) ou la surface inférieure du moule supérieur (140) et étant fabriquées dans des matériaux à base de treillis métallique (121a) et (141a).
PCT/KR2007/005934 2007-06-19 2007-11-23 Moule permettant de fabriquer une meule à tronçonner WO2008156235A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2007-0059735 2007-06-19
KR20070059735 2007-06-19
KR10-2007-0112602 2007-11-06
KR1020070112602A KR100809623B1 (ko) 2007-06-19 2007-11-06 커팅 휠 제조용 몰드

Publications (1)

Publication Number Publication Date
WO2008156235A1 true WO2008156235A1 (fr) 2008-12-24

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Application Number Title Priority Date Filing Date
PCT/KR2007/005934 WO2008156235A1 (fr) 2007-06-19 2007-11-23 Moule permettant de fabriquer une meule à tronçonner

Country Status (2)

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KR (1) KR100809623B1 (fr)
WO (1) WO2008156235A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103009279A (zh) * 2012-12-11 2013-04-03 东莞润明电子科技有限公司 金字塔研磨盘的加工方法
CN103009273A (zh) * 2012-12-11 2013-04-03 东莞润明电子科技有限公司 金字塔研磨盘

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103072100B (zh) * 2013-02-01 2014-12-24 莒县科发设备厂 摆动式自动砂轮成型机
CN104589225B (zh) * 2014-12-04 2017-03-29 泰兴市和庆机械配件厂 一种砂轮生产投料压网系统
CN107803755B (zh) * 2017-10-10 2019-06-14 乐清市赛而乐电器科技有限公司 具有拨均结构的砂轮模具

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524836A (en) * 1978-08-05 1980-02-22 Yozo Shimizu Method of producing rotary grinding disc
JPS5969267A (ja) * 1982-10-07 1984-04-19 Yozo Shimizu 切断用回転砥石盤の製造方法
JPH0542482A (ja) * 1991-08-10 1993-02-23 Sadayuki Yano 砥石車とその製造方法
JPH0663870A (ja) * 1992-08-21 1994-03-08 Tokyo Kensaku Toishi Kk 回転砥石盤およびその製造方法
WO1998029226A1 (fr) * 1996-12-25 1998-07-09 Sony Corporation Moule metallique pour substrat de disque, procede de fabrication et ensemble moule metallique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5524836A (en) * 1978-08-05 1980-02-22 Yozo Shimizu Method of producing rotary grinding disc
JPS5969267A (ja) * 1982-10-07 1984-04-19 Yozo Shimizu 切断用回転砥石盤の製造方法
JPH0542482A (ja) * 1991-08-10 1993-02-23 Sadayuki Yano 砥石車とその製造方法
JPH0663870A (ja) * 1992-08-21 1994-03-08 Tokyo Kensaku Toishi Kk 回転砥石盤およびその製造方法
WO1998029226A1 (fr) * 1996-12-25 1998-07-09 Sony Corporation Moule metallique pour substrat de disque, procede de fabrication et ensemble moule metallique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103009279A (zh) * 2012-12-11 2013-04-03 东莞润明电子科技有限公司 金字塔研磨盘的加工方法
CN103009273A (zh) * 2012-12-11 2013-04-03 东莞润明电子科技有限公司 金字塔研磨盘

Also Published As

Publication number Publication date
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