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WO2000045994A1 - Concassage de billes, et procede et dispositif de production de billes associes - Google Patents

Concassage de billes, et procede et dispositif de production de billes associes Download PDF

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Publication number
WO2000045994A1
WO2000045994A1 PCT/JP2000/000516 JP0000516W WO0045994A1 WO 2000045994 A1 WO2000045994 A1 WO 2000045994A1 JP 0000516 W JP0000516 W JP 0000516W WO 0045994 A1 WO0045994 A1 WO 0045994A1
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WO
WIPO (PCT)
Prior art keywords
crushing
beads
crushed
resin
molded product
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2000/000516
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English (en)
Japanese (ja)
Inventor
Naoyoshi Tomioka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone 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 Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP2000597095A priority Critical patent/JP3626098B2/ja
Priority to AU23234/00A priority patent/AU2323400A/en
Publication of WO2000045994A1 publication Critical patent/WO2000045994A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone

Definitions

  • the present invention is applicable to the grinding of various metal and synthetic resin parts, the peeling of coating films, rust, burrs, adhesive layers, seals, etc., the cleaning and polishing of various tools, jigs, polishing, road marking signs or concrete.
  • the present invention relates to beads used for instantaneous peeling of wall stains and the like, and further relates to a method and an apparatus for producing the beads.
  • thermosetting resin Fine beads of thermosetting resin are sprayed by air pressure to grind the surface of various metals, synthetic resins-wood, glass, and other materials, and paint films, rust, burrs, adhesive layers, seals, and waxes.
  • a method of instantaneously peeling off road markings, dirt, graffiti, etc. on road surface signs, concrete wall surfaces or tiles such as white roads For example, in Japanese Patent Application Laid-Open No. HEI 4-111776, a molded product obtained by adding a filler such as a reinforcing material or a filler, a coloring agent, or the like to a thermosetting resin, kneading the mixture, and heat-curing to cure the molded product is used.
  • the powder is crushed into a mesh of 5 to 100 to provide an abrasive for a base treatment of a coating, and this is sprayed onto a coating surface of a metal product to peel off the coating.
  • a thermosetting resin is cured and pulverized, treated with a titanium coupling agent, and dispersed in the thermosetting resin before curing. It discloses that the material is ground into an abrasive.
  • Japanese Patent Application Laid-Open No. H8-733813 in order to eliminate the electrification on the object to be cleaned by the resin particles for cleaning, the electric potential elimination of the ether 'nitrile compound is applied to the resin particles for cleaning.
  • Thermosetting resins have long been manufactured and sold as fine powder dried resins and resins for granular molded products.
  • Melamine resin and Urea resin as raw materials (raw materials) It is standardized as a general-purpose product with specific gravity, hardness, etc. (JIS K 6917, K 6916), with 60 to 70% of melamin powder and 2 to 4 monograms per melamin monolayer. (30% to 40% aqueous solution of formaldehyde), 0.1% catalyst, and 40% to 30% filler such as pulp Molded melamine resin has a hard surface and no filling It is also known that the specific gravity in the case of lumber: 1.48 rises to some extent.
  • thermosetting resin molded products with a circular or polygonal cross section are obtained by cutting thermosetting resin molded products with a circular or polygonal cross section into fine pieces in the shape of a cylinder or a square tube.
  • the peeling ability was insufficient, and it took time to completely peel off, and there was a limit to the particle size adjustment.
  • a first object of the present invention is to provide a pulverized thermosetting resin molded product, in which each particle is formed into an irregularly shaped polyhedral fine substance substantially surrounded by a sharp ridgeline, and a particle size at a classification stage.
  • An object is to provide beads that are almost homogenized within a certain range.
  • a second object of the present invention is to roughly pulverize a plate-like molded product of a thermosetting resin, and then pulverize between rolls having irregularities with a phase difference of 1/2 pitch formed on the roll surface. Accordingly, it is an object of the present invention to provide a method and an apparatus for producing beads for grinding and peeling an irregular polyhedron having a sharp ridge line. Disclosure of the invention
  • the beads according to the present invention are characterized by having the following configuration.
  • the present invention relates to a crushed product of a thermosetting resin molded product having a particle size of 1000 to about 5.0 m, wherein each particle is substantially irregular and fine polyhedron surrounded by sharp ridges. This is a grinding / peeling bead whose grain size at each classification stage is almost homogenized within a certain range.
  • the thermosetting resin is filled with pulp and glass fiber crushed pieces, and further contains carbon, artificial graphite or metal fibers. Specifically, 30 to 40% of a valve and 0.1 to 0.5% of a glass fiber cloth piece are mixed in the thermosetting resin material after condensation, and static electricity is generated after the resin is aged and dried. Compounded with carbon powder or artificial graphite with electrical conductivity of 0.2 to 0.3 for suppression and electrification suppression, and 0.1 to 0.5% of metal powder or metal fiber to increase specific gravity to 1.8 or more I do.
  • the present invention uses a thermosetting resin plate-like molded product.
  • the obtained product is crushed (roughly divided) into a die shape or a pellet shape, and then the irregularities on the roll surface facing the same are obtained. Is crushed by a multi-stage crushing roll arranged with a 1/2 pitch phase shift to form irregular polyhedral fines (beads) with sharp ridges.
  • thermosetting resin melamine resin (melamine-formaldehyde resin), urine resin (urea-formaldehyde resin), phenol resin, and unsaturated resin Polyester, acrylic, guanamine, epoxy or polyurethane alone, or with hardness and specific gravity ⁇
  • thermosetting resins with different viscosities can be mixed. These materials are non-polluting even when used, have high electrical insulation resistance for the purpose of expanding the range of use, are resistant to alkaline acids, are relatively high in heat resistance, Non-flammable (flammable, ignitable), non-toxic (styrene, ester, etc.), and relatively powdery due to the impact of nozzle injection during recycling.
  • a force for crushing a resin plate-like molded product obtained by mixing a urea resin and / or a phenol resin with a melamine resin, or a melamine resin, a urea resin, or a phenol resin
  • the different types of resin plates are coarsely crushed and mixed, and then ground to form irregular polyhedral fines.
  • a plate-shaped molded product of thermosetting resin is an irregular shape of approximately 2 to 4 mm square (maximum thickness 5 mm, flat object with approximately 7 sides).
  • a crusher section that crushes into a shape like a pellet, a sorting section that removes metal and foreign matter in crushed material crushed by a part of the crusher, and a 1Z2 pitch Coarse with crushing rolls for crushing the crushed material selected at the sorting unit with irregularities formed with a phase shift Similar to the crushing part of the crushing part and the crushing part, there is also a phase shift of 1 Z 2 pitch on the roll surface.
  • the crushed material obtained in the crushing part with irregularities formed has a particle size of 100 to 500 ⁇ m. It comprises: a crushing section having a multi-stage crushing roll pair for processing into amorphous fine polyhedral beads having a sharp ridge at ⁇ ; and a classification device arranged downstream of the crushing section.
  • the crushing unit equipped with the above-mentioned multi-stage crushing roll pair has a particle size adjustment mechanism that changes and adjusts the bead particle size by setting the unevenness pitch of the crushing rolls and the clearness between the opposing rolls to be optimal. I have it.
  • this bead manufacturing apparatus arranges a classifier such as an air classifier, an electric power classifier, and a vibrating sieving machine downstream of the pulverizing section to classify the beads, weigh and classify the classified beads.
  • a classifier such as an air classifier, an electric power classifier, and a vibrating sieving machine downstream of the pulverizing section to classify the beads, weigh and classify the classified beads.
  • a circulation line is provided to return the fines above or below the mesh in each classifying step upstream of the sorting section or upstream of the crushing section, and the fine particles generated in each step from the crusher section to the classifying apparatus are provided. Equipped with a powder transport conveyor or duct that guides dust containing particles to the dust treatment equipment.
  • a vibrating sieve having several stages of sieves with successively finer stitches and deriving shoots from sieves on each sieve is suitable.
  • the first-stage mesh-up is sent to the crusher and crushed again, and the lower-most mesh under is discarded as dust.
  • the beads obtained by the present invention can be ground without damaging various metals, synthetic resins, wood, glass and other products, or painted films, adhesive layers, seals, waxes, concrete walls or tiles. Used for instantaneous peeling of stains and graffiti.
  • the products to be processed include coating and peeling of equipment and parts, rust removal, reproduction of defective coating, electrical components, molded products, molds, cleaning of jigs, etc. It is used for polishing, polishing, road marking (white line, etc.), and peeling off of adhering materials or seals on buildings.
  • the advantages of using the above bead are that the speed of grinding and peeling has been shortened, making it possible to shorten the working time, not to damage the work, to reduce costs, and to reduce dust and dust. Low noise generation.
  • the beads of the present invention are excellent in antistatic properties, economical efficiency and grinding / peeling properties, and are suitable for recyclability, as described below. 1.
  • a specific filler is blended to form a peeling bead. The aim is to improve the effect of removing particles.
  • Carbon powder (carbon black) is blended as filler (trace%).
  • Molding of resin plate The above-mentioned raw material is filled in a mold, and molded (Zmra for 60 to 180 seconds) under pressure (150 to 200 kg / cm 2 ) and heating (130 to 165 ° C).
  • the molding time varies depending on the thickness of the molded product, but a high hardness can be obtained by increasing the molding time at a low temperature.
  • High-end products such as resin products, electronic components or molded products
  • FIG. 1 is a flowchart of the method for producing a peeling bead of the present invention.
  • FIG. 2 is a layout diagram showing an outline of a bead manufacturing apparatus for carrying out the present invention.
  • FIG. 3 is a perspective view of the crushing unit of FIG.
  • FIG. 4 is an enlarged perspective view of the grinding roll pair in FIG.
  • FIG. 5 is an enlarged cross-sectional view of the uneven teeth of the crushing roll.
  • FIG. 6 is an enlarged sectional view showing the deformation of the uneven teeth of the crushing roll.
  • FIG. 7 is a layout diagram showing details of each part from pulverization to packaging in FIG.
  • FIG. 8 is an enlarged plan view illustrating a group of peeling beads.
  • Figure 1 shows the bead production flow
  • Melamine powder 1a, formalin 1b, and alcohol or acid catalyst 1c are charged into reaction tank 2 and polymerized and condensed, and then transferred to mixing tank 3 to be used as a filler.
  • carbon powder (a carbon black having a conductivity of 0.3%) for suppressing static electricity generation during blasting and a carbon powder for increasing the specific gravity are used.
  • 0.1 to 0.5% of metal fiber 6a is blended, and a coloring material is blended if necessary.
  • molding material (melamine resin) 8a obtained by almost the same procedure as above, knead 8c, pressurize and heat and mold to form a resin with a thickness of 2 to 5 mm with different hardness and specific gravity Get 10
  • the raw material is formed into a plate-like material, and the process from crushing (crushing) to crushing and packaging is not only performed consistently, but it is divided into several processes.
  • a crusher 11 for crushing each of the above-mentioned plates 10 into a die or a pellet of about 2 to 4 mm square, a pre-mixing section 12 for mixing crushed materials, and a magnetic separation for foreign substances. Separation section 14, crushing 15, crushing with several crushing rolls 16, sieving 18, weighing 23, packing 24, and then unloaded 25.
  • FIG. 2 is a front view schematically showing a bead manufacturing apparatus
  • FIG. 3 is an enlarged perspective view of a crushing unit in FIG. 2
  • FIG. 4 is an enlarged cross-sectional view of a crushing roll in FIG.
  • the resin plate 10 is selected from molding materials such as melamine resin, urea resin, phenol resin, unsaturated polyester, acrylate, guanamine, epoxy or polyurethane. 60% to 80% of melamine mixed with 40% to 20% of urea, one resin is made of melamine, urea, and funinol resin. It may be a mixture of two or more types of mixed materials, such as mixing.
  • the melamine resin plate and the urea resin plate or the phenol resin plate may be crushed by a crusher, and then mixed. Unlike conventional hammer mills, disk crushers, cone crushers, oscillators, etc., the crusher 11 has several movable blades (closed flat cutters with serrated blades) attached to the rotor.
  • a type that crushes between the fixed blade and the fixed blade by rotation of the rotor (not shown) is used.
  • Hammer type crushers are not effective because only a lot of cracks appear in the crushed product or dust is generated during crushing.
  • the resin plate 1 ⁇ is not limited to sheet-like material, but should be used in advance to crush crushed thermosetting resin materials, such as sprues, runners and defective moldings generated during molding of resin materials.
  • the crusher unit 11 in Fig. 2 is omitted and the mixture is directly introduced into the mixing unit 12. You may. [Crushing and sieving of crushed material]
  • An automatic feeder 13 and a rectifying feeder 13a are provided below the mixing section 12.
  • the crushed material flowing down by the rectifying feeder 13a is rectified into a layer having a substantially uniform thickness, and sent to the metal ⁇ 'sorter 14 for removing foreign matter.
  • a crushing unit (with a pair of crushing rolls and a static eliminator) 15 and a crushing unit (multi-stage crushing roller pair and a static eliminator) 16 are provided, and further switched It is connected to a screening section 18 through a valve 17.
  • the sieving section 18 is composed of an air classifier 21 for classifying fine particles and a power classifier 22 for classifying large-diameter particles from fine particles.
  • the classified granules (beads for peeling) are packaged into peeling beads of a predetermined volume by the bagging machine 23 with an automatic weighing machine, which corresponds to the packaging shipping department, and the automatic bag mouth sewing machine 23, and the transporter 2 It is carried out of the site using 5 mag.
  • the fines on the mesh of the electric power classifier 22 are introduced into the circulation pipe 26a and returned to the rectifier feeder 13a with hopper upstream of the sorting section 14a.
  • the fine particles on the mesh of 21 are introduced into the circulation pipe 26 b and returned upstream of the crushing section 15.
  • the dust generated at each stage is sent to an upper dust treatment device (separation device) 28 through a duct 27 as shown by the dotted line in Fig. 2, and the dust having a predetermined particle size is passed to the mixer 12.
  • the fine powder having a predetermined particle size or less is sent to the dust collector 29 for disposal.
  • 15a and 15a are crushing rolls
  • 15b is a honno
  • 15c is a rectifying feeder for rectifying the crushed material flowing down from the hobber into a layer having a substantially uniform thickness.
  • the crushing roll 15a has lateral grooves 35 extending in the generatrix direction at regular intervals on the circumference of the roll surface, as described later for the crushing roll, and has many irregularities 36 on the roll surface. Let me.
  • crushed pieces of 2 to 4 mm square die or pellets at the crusher section 11 are crushed into approximately 2 mm square by rotating the crushing rolls 15a and 15a. I do.
  • FIG. 3 is an enlarged perspective view of the crushing section 16 in the bead manufacturing apparatus
  • FIG. 4 is a perspective view of a crushing roll pair.
  • a pair of pulverizing rolls 31, 31, 32, 32, 33, and 33 are laid on the frame 30 in three vertical stages.
  • Each roll surface has several (four) lateral grooves 35 extending in the generatrix direction at regular intervals on the circumference, and a number of mountain-shaped irregularities 36 on the roll surface.
  • Fig. 5 Ni will Yo described later, the mouth one by operating the Lee Nde' click scan gauge dial 3 7. Le gap 0.1 to adjust to 0. 2 m m ( Figure 4).
  • Figure 6 shows a roll with a number of angular irregularities 36a formed on the roll surface.
  • a scraper 38 is placed close to each roll.
  • 40 is a motor with a speed reducer
  • 41, 42, and 43 are portal shafts of each stage
  • 44 is a chain hung between the motor and the first stage roll shaft sprocket
  • 45 is a chain hung between the sprockets of the roll rollers facing each other.
  • a synchronous rotation gear (not shown) is interposed between the opposing first-stage roll shafts.
  • the roll pitch is gradually increased while the roll pitch is gradually reduced from the first stage to the third stage.
  • the diameter of each roll is 150 mra, and the uneven pitch and rotation speed of each stage are as follows.
  • the rolls of the crushing section 15 also have the same irregularities.
  • the end of the top is abutted against the side wall of the frame to form the alignment mechanism. Adjusting the effective length of the adjust port by manual operation, and slightly moving the rear roll in the axial direction, aligning the roll unevenness (peaks and valleys). Is achieved.
  • the clearance between the rolls is adjusted according to the hardness, material, grain size, etc. of the resin, but is usually about 0.11 to 0.3 mm or more.
  • Adjusted to the left and right bearings of the other roll (for example, the roll 31 in front of each stage in Fig. 2) supported to be movable in the front-rear direction Screw 37a is fixedly attached, and index handles (index gauge dials) 37, 37 are provided at the ends thereof.
  • Adjustment of the clearance is performed by rotating the index handle and moving the left or right or left or right bearing in the front-rear direction.
  • FIG. 3 only the index handles 37 and 37 on the right side of the frame are shown, and the index handle on the left side is not shown.
  • the homogenization is performed using special rolls of several stages in the crushing and crushing sections.
  • the roll shape pitch, clearance
  • a static electricity eliminator is installed in the crushing section and crushing section to prevent static electricity from being generated in places (sites) where pressure, impact, shear, and friction occur on the material.
  • Dust containing fine particles generated at each stage from the crusher section to the classifier can be extracted from, for example, Patent No. 2891 163 1 (Japanese Patent Application Laid-Open No. Hei 8-252223).
  • the particles are separated into reusable granular beads and dust by a granular separation device (dust treatment device) as disclosed in (1).
  • the granular material separation device includes: a cylindrical separation container (separation chamber); a storage container formed on the outer periphery of the separation container; dust and renewable fine particles generated during the crushing step. (Beads) are blown into the separation container (2) together with compressed air, so that a carry-in tube is attached to the separation container through the side wall of the storage container; and is arranged in the separation container and is delivered from the carry-in tube.
  • a diffusion member for diffusing and separating the dust and renewable beads obtained by the difference in mass comprising a group of discs with punching holes or slits which are spaced apart from each other and stacked in several stages;
  • a discharge pipe for dust provided on a side wall near the top of the containment vessel; and a tank disposed below the containment vessel and the separation vessel to accommodate renewable beads after dust separation. Is composed of I have.
  • the separation container discharges dust that has not passed through the diffusion member to a discharge pipe near the top of the storage container, and is higher than a bead receiving surface of the diffusion member.
  • the storage container is further provided with a first discharge port, and the storage container is configured to discharge dust floating through the punching holes or slits of the diffusion member into the reusable bead storage tank and floating to the discharge pipe side.
  • a second outlet is provided at the bottom of the containment tank, which is the upper plate of the storage tank.
  • the reusable beads and dust are extremely efficiently diffused by the diffusion member composed of a plurality of upper and lower punching holes or a group of disks with slits arranged in the separation container.
  • the diffusion member composed of a plurality of upper and lower punching holes or a group of disks with slits arranged in the separation container.
  • the details of the particle separation device (dust treatment device) 28 are omitted from the drawings because they are disclosed in the aforementioned Japanese Patent No. 2891631, but the mixture of reusable beads and dust generated at each stage is suctioned. It is transported into the separation vessel (separation chamber) by duct 27. Since the dust collector 29 is operating, the inside of the separation vessel is under negative pressure. Therefore, the mixture of beads and dust blown from the inlet violently collides with the inner wall of the separation container, the lower surface of the inner lid, and the upper surface of the uppermost diffusion plate and diffuses at high speed.
  • the reusable particles having a large mass and the dust not discharged from the first discharge port 46 pass through the respective punch holes or slits of the diffusion plate (not shown) and pass onto the diffusion plate. It falls and collides with the upper surface of the diffuser plate to diffuse.
  • the low-mass dust is again blown up, and is discharged from the first discharge port 46 through each punch hole or slit of the diffusion plate.
  • the reusable particles and the remaining small amount of dust that have passed through the diffusion plate fall down to the lower part of the hopper tank. (2) It is blown out from the discharge port (47) and discharged from the dust discharge port through the space between the outer wall and the inner wall of the separation container (28).
  • This section describes the reuse of beads during blasting.
  • the beads By spraying on the target object, the beads are crushed to reduce the particle size, and the sharp ridge portion is rounded.
  • the beads are repeatedly reused by sieving using the separation device. Even if the bead diameter becomes smaller, the polyhedral shape of each particle and the grinding / peeling efficiency do not change.
  • Target It can be reused several to several tens times (for example, 60 times) depending on the hardness of the product, the hardness of the beads, specific gravity, air pressure, spray angle, spray distance, etc.
  • MG-14 (106 ⁇ m or less, for example, about 50 ⁇ m) does not recycle only once.
  • the first discharge port 46 is arranged to face the upper surface of the diffusion plate, which is the particle receiving surface of the diffusion member. Therefore, the dust diffused by the diffusion member can be easily blown out.
  • the first discharge port 46 is disposed above the upper surface of the diffusion plate, which is the particle receiving surface of the diffusion member. Therefore, the possibility that the reusable beads having a large mass are blown out from the first outlet 46 is reduced, and as a result, the separation accuracy is improved.
  • a second discharge port 47 is provided above the hobba, which is a reusable granule storage tank. Accordingly, the possibility that the reusable granules having a large mass are blown out from the second discharge port 47 is reduced.
  • FIG. 7 is an arrangement diagram of each device showing another example from crushing to packaging.
  • the beads crushed by the roll crusher 16 shown in FIGS. 2 and 3 are classified by the vibrating sieve 20.
  • This vibrating sieve 20 has several stages of sieve nets 50 to 53 (for example, 6, 20, 32, 50 meshes) in which the stitches are sequentially made fine, and hits each sieve net.
  • the shoots 50a to 53a from the outer wall of the sieve and the shoots 54 from the bottom of the lowermost sieve are led out and connected to the conveyor or ducts 55 to 59, respectively.
  • Each sieve mesh 50 to 53 provided inside the vibrating sieve 20 can be replaced with any mesh, and the bead size is classified within the range from 10 mesh or less to 150 mesh. It is possible to do so.
  • the crusher 16 and the sieving machine 20 in FIG. 7 can be installed in two or more lines, but for simplicity of explanation, the case where only one line is used is illustrated and described.
  • the first bagging line 60 is provided by a switching damper 61 provided at the downstream end of the conveyor 57, and is provided with a double-toned flexible container (flexible container) filling machine 62 and a 20 kg bagging machine 62. Connected to 0.
  • the frecon packing machine 62 consists of a hopper with a level detector 63, a loading dang, ° 64, a frecon bag 65, a platform scale 66 and a conveyor 67, and a 20 kg bag filling machine
  • Reference numeral 70 denotes a hopper 71 with a level detector, a hopper 72 with a weighing and sewing machine, a bag 74 and belt conveyors 75, 76.
  • the second bag-filling line 80 is a hopper 81 with a level detector, a screw conveyor 82, an input dumper 83, and a hood 81 with a level detector provided at the lowermost end of the powder transport conveyor 58. It consists of a phono with a measuring device, ° 84, and 20 kg packaging bags 86 are sequentially carried out by a conveyor.
  • beads made of thermosetting resin such as those described above are mixed.
  • These beads 90 have a hardness (Mohs) of 3.0-4.5, specific gravity 1.:! ⁇ 1.52, size 10 ⁇ : L50 mesh (about 10000 ⁇ : ⁇ ⁇ ⁇ ) ⁇ ), as shown in Fig. 8 (25 times), each forms an irregular polyhedron with sharp edges. However, it can be used even if it is 100 ⁇ m or less (for example, 50 ⁇ m).
  • beads ejection amount is 1.
  • the peel time per m 2 is 3 to 6 mi m 2 .
  • the number of recycles of beads depends on the pressure, but is usually 15 to 40 or more.
  • the performance of the above beads is primarily specified by material, hardness and specific gravity, secondary is excellent in cutting performance, abrasion resistance, heat resistance, anti-static property, and tertiary is blast
  • the work speed is high, the dust generation rate is low, the reusability is high, and the bead dust itself is pollution-free and can be treated as general waste.
  • MG-0 for peeling bumper chips
  • MG-1 for coating hard materials (steel materials) for removing oxide scale and road markings
  • MG-1 for coating films, rust, Paris, adhesives, seals, floor wax, etc.
  • MG-3 or MG-15 for cleaning of peeling, anti-glare on metallic glossy surfaces, walls or tiles, coating film of soft material (such as aluminum) 'Rust' Burr.
  • MG_7, soft for wall cleaning MG-10 or MG-14 is used for wall coating or floor cleaning.
  • a 3 to 5 mm thick plastic plate-like molded product formed by heating and pressing a mixed material of 6% by weight of melamine resin and 40% of urea resin by a crusher. After being crushed into a batter shape, it was roughly crushed and pulverized by the above-mentioned device to obtain a release material of 20 to 65 mesh, which was sprayed on an aluminum can coating film to peel off the coating film.
  • the capacity of one 6 mm diameter nozzle is 2 kgcm 2 air pressure and the amount of beads ejected is 1.
  • a mixture of 70% of crushed resin plate and 30% of crushed resin plate was crushed by a crusher, and then crushed and pulverized.
  • As a release material for 0 to 65 mesh, the coating film was peeled off by spraying it onto the aluminum can coating film, and the coating film was successfully removed as before.
  • a crushed plate-like resin molded product molded from a mixed material of a melamine resin and a phenol resin is crushed and crushed by the above-mentioned equipment to obtain a mesh release material of 20 to 65, which is used as a steel can.
  • the coating film was peeled off by spraying on the 100 micron coating film. 6 mm ⁇ No capacity per one nozzle is, the air pressure 3 kg / cm 2, a bead ejection amount 1. O kg Zmin, 1 m 2 per stripping time 3 result treated with MinZm 2, and cleanly peeled coating film A metallic luster could be exhibited.
  • the present invention is characterized in that in the production process, after crushing in a crushing section, crushing and sieving are performed by several stages of crushing rolls, so that the crushing is performed at each classification step adapted to the purpose of work processing. Grinding or peeling beads with a uniform particle size can be easily manufactured. In particular, emphasis is placed on the shape of the crushing roll (concavo-convex pitch, clearance of the opposing roll), and grinding and polishing of various workpieces. In addition, irregular polyhedral beads suitable for instantaneous peeling can be provided. By selecting the shape of the crushing roll, it is easy to change and adjust the bead particle size, and it is possible to efficiently produce beads with less generation of dust and noise during the crushing process.
  • the homogenization of the particle size of the beads improves the grinding and peeling ability, and can shorten the work time for instantaneous peeling and the like. Furthermore, beads that are useful for peeling work such as peeling off coatings on aluminum cans, steel cans, automobile bumpers, etc., and regenerating non-consumables can be efficiently used without damaging the peeled product (work). It can be manufactured.

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  • Food Science & Technology (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

L'invention concerne un procédé de concassage ou de séparation de billes destiné à leur conférer une taille des grains facile à mettre au point. Les billes sont constituées d'éléments polyèdres amorphes minces qui conviennent pour une séparation instantanée et présentent des tailles des grains homogènes conformes à la nomenclature. Le dispositif de production des billes comprend des unités de concassage (11) pour concasser grossièrement des moulages lamellaires d'une résine thermoplastique sous forme de cubes ou de granules, et une unité de concassage à rouleaux (16). Cette unité de concassage (16) comprend des rouleaux à plusieurs étages (31 à 33) dans lesquels des aspérités (36) formées sur les surfaces de chaque paire de rouleaux opposés sont déviées par phases à un demi pas, et pulvérise des pièces de résine thermodurcissables concassées grossièrement pour leur conférer des tailles précises. Des dispositifs de criblage (20, 21, 22) disposés en aval de l'unité de concassage (16) trient les pièces obtenues et les classent en catégories de billes homogènes composées d'éléments polyèdres amorphes minces présentant des arêtes vives.
PCT/JP2000/000516 1999-02-01 2000-01-31 Concassage de billes, et procede et dispositif de production de billes associes Ceased WO2000045994A1 (fr)

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JP2000597095A JP3626098B2 (ja) 1999-02-01 2000-01-31 研削用ビーズとビーズの製造方法並びに製造装置
AU23234/00A AU2323400A (en) 1999-02-01 2000-01-31 Grinding beads and beads production method and device therefor

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JP11/24063 1999-02-01
JP2406399 1999-02-01

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WO2000045994A1 true WO2000045994A1 (fr) 2000-08-10

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JP2002275254A (ja) * 2001-03-22 2002-09-25 Kanebo Ltd ポリエステルの製造方法
JP2002346932A (ja) * 2001-05-21 2002-12-04 Sumitomo Bakelite Co Ltd 粒状熱硬化性樹脂製研磨材及びその製造方法
US6742529B2 (en) * 2000-08-25 2004-06-01 Techno Polymer Co., Ltd. Resin recycling system
WO2005002796A1 (fr) * 2003-07-01 2005-01-13 Bridgest0Ne Corporation Procede de projection de particules
WO2005063443A1 (fr) * 2003-12-26 2005-07-14 Bridgestone Corporation Procedes de traitement de surface de roue en aluminium
KR100650131B1 (ko) 2005-12-19 2006-11-27 주식회사 케이씨텍 건식세정장치
JP2007268656A (ja) * 2006-03-31 2007-10-18 Sumitomo Metal Ind Ltd 切削工具およびその製造方法
JP2008189841A (ja) * 2007-02-06 2008-08-21 Hitachi Plant Technologies Ltd スポンジブラスト媒体の再生方法及びその装置
CN102614955A (zh) * 2012-03-20 2012-08-01 黎贤饶 一种陶瓷粉料碎料混料机构
CN108722556A (zh) * 2018-06-22 2018-11-02 贵州大学 一种降尘岩体破碎系统
CN111349501A (zh) * 2020-03-18 2020-06-30 襄阳职业技术学院 一种农林废弃物的粉碎炭化一体化装置
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CN115318803A (zh) * 2022-08-31 2022-11-11 安徽国伟金属资源有限公司 线路板回收用破碎分离装置
CN117696174A (zh) * 2024-02-04 2024-03-15 哈尔滨商业大学 一种米粉加工用碾米装置及其使用方法

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US6742529B2 (en) * 2000-08-25 2004-06-01 Techno Polymer Co., Ltd. Resin recycling system
JP2002275254A (ja) * 2001-03-22 2002-09-25 Kanebo Ltd ポリエステルの製造方法
JP2002346932A (ja) * 2001-05-21 2002-12-04 Sumitomo Bakelite Co Ltd 粒状熱硬化性樹脂製研磨材及びその製造方法
WO2005002796A1 (fr) * 2003-07-01 2005-01-13 Bridgest0Ne Corporation Procede de projection de particules
WO2005063443A1 (fr) * 2003-12-26 2005-07-14 Bridgestone Corporation Procedes de traitement de surface de roue en aluminium
KR100650131B1 (ko) 2005-12-19 2006-11-27 주식회사 케이씨텍 건식세정장치
JP2007268656A (ja) * 2006-03-31 2007-10-18 Sumitomo Metal Ind Ltd 切削工具およびその製造方法
JP2008189841A (ja) * 2007-02-06 2008-08-21 Hitachi Plant Technologies Ltd スポンジブラスト媒体の再生方法及びその装置
CN102614955A (zh) * 2012-03-20 2012-08-01 黎贤饶 一种陶瓷粉料碎料混料机构
CN108722556A (zh) * 2018-06-22 2018-11-02 贵州大学 一种降尘岩体破碎系统
CN111349501A (zh) * 2020-03-18 2020-06-30 襄阳职业技术学院 一种农林废弃物的粉碎炭化一体化装置
CN111349501B (zh) * 2020-03-18 2021-03-05 襄阳职业技术学院 一种农林废弃物的粉碎炭化一体化装置
CN111550986A (zh) * 2020-05-12 2020-08-18 范智锋 一种中药材粉碎干燥一体机
CN115318803A (zh) * 2022-08-31 2022-11-11 安徽国伟金属资源有限公司 线路板回收用破碎分离装置
CN115318803B (zh) * 2022-08-31 2024-04-23 安徽国伟金属资源有限公司 线路板回收用破碎分离装置
CN117696174A (zh) * 2024-02-04 2024-03-15 哈尔滨商业大学 一种米粉加工用碾米装置及其使用方法
CN117696174B (zh) * 2024-02-04 2024-05-07 哈尔滨商业大学 一种米粉加工用碾米装置及其使用方法

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