WO2005084911A1 - Appareil et procede d'elimination de revetement d'article moule - Google Patents

Appareil et procede d'elimination de revetement d'article moule Download PDF

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Publication number
WO2005084911A1
WO2005084911A1 PCT/JP2004/002972 JP2004002972W WO2005084911A1 WO 2005084911 A1 WO2005084911 A1 WO 2005084911A1 JP 2004002972 W JP2004002972 W JP 2004002972W WO 2005084911 A1 WO2005084911 A1 WO 2005084911A1
Authority
WO
WIPO (PCT)
Prior art keywords
dry ice
film
molded article
compressed air
processing
Prior art date
Application number
PCT/JP2004/002972
Other languages
English (en)
Japanese (ja)
Inventor
Hiroaki Kamiyama
Nobukazu Manaka
Original Assignee
Stolz Co. Ltd
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 Stolz Co. Ltd filed Critical Stolz Co. Ltd
Priority to PCT/JP2004/002972 priority Critical patent/WO2005084911A1/fr
Publication of WO2005084911A1 publication Critical patent/WO2005084911A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/02—Deburring or deflashing

Definitions

  • the present invention relates to an apparatus and a method for removing a coating film on a molded article, which removes an unnecessary portion of a coating film provided on the surface of the molded article, and more specifically to an improvement in processing accuracy and an improvement in working efficiency.
  • the deburring device is a deburring device for removing a burr of a transfer foil generated when a transfer foil is transferred from a transfer film to a surface of a molded product, and supplies the transfer molded product to a deburring position.
  • the above background art has the following disadvantages.
  • Patent Document 1 when a hole or an opening is formed in the molded article, a hole is previously formed in a coating portion covering the hole or the opening in another step, and thereafter, a hole is formed around the periphery. Will be deburred. In other words, drilling and deburring of the coating cannot be performed at the same time, so the work efficiency cannot be said to be high.
  • the present invention relates to a removing device for removing an unnecessary portion of a coating film provided on a surface of a molded article, comprising: compressed air generating means for generating compressed air; A dry ice supply unit for supplying the dry ice in a powdery or particulate form, which is provided in a pressurized air, by a compressed air generated by the compressed air generation unit; Dry ice jetting means for jetting toward the surface, dust collecting means provided in the processing booth, for sucking and removing dust of the film removed by the jetting of the dry ice, at least in the processing booth. At least one static electricity removing means for removing static electricity generated by the collision between the dry ice and the object to be processed.
  • the dry ice supply means crushes the pellet-shaped dry ice sent from the storage means for storing the pellet-shaped dry ice into particles having a predetermined particle size.
  • a crushing means wherein the crushing means crushes the dry ice pellet into particles having a particle size of 0.011 mm to 3.0 mm. More preferably, the crushing means is characterized in that the dry ice is crushed into particles having a particle size of 0.1 mm to 0.3 mm.
  • the dry ice supply means includes dry ice pellet generating means for generating dry ice pellets.
  • the storage means has a stirring means for the stored dry ice pellets.
  • the pressure of the compressed air is set to 0.05 Mps to 1.0 Mps. More preferably, the pressure of the compressed air is 0.1 Mps to 0.3 Mps.
  • the static eliminator is a first static eliminator for blowing static elimination air toward the surface of the molded article to be processed, and a static eliminator for blowing a static eliminator over the entire inside of the processing booth.
  • the static electricity removing means of claim 2 is included.
  • a transfer means for transferring the processing target to a predetermined position in the processing booth is provided.
  • the dry air blowing means is provided in the processing booth, near the outlet in the transfer direction by the transfer means or near the outlet of the processing object, and blows dry air toward the processing object after removing the film.
  • the dry air blowing means includes a third static electricity removing means for blowing static elimination air toward a processing target after removing the film.
  • a method for removing a coating film of a molded article according to the present invention uses the removal apparatus according to any one of claims 1 to 11 to remove unnecessary portions of a coating film provided on the surface of the molded article, and to process the film.
  • the coating covering the hole or the opening is removed along the periphery thereof.
  • FIG. 1 is a diagram showing the overall configuration of an embodiment of the film removing apparatus of the present invention.
  • FIG. 2A is a perspective view showing a part of a workpiece to be processed in the embodiment.
  • FIG. 2B is a diagram showing a state of film removal according to the embodiment, and is a cross-sectional view of FIG. 2A cut along line # A_ # A and viewed in the direction of the arrow.
  • FIG. 2C is a cross-sectional view showing the workpiece after removing the film according to the embodiment.
  • FIG. 2D is a diagram showing another example of the work to be machined according to the present invention.
  • FIG. 1 is a diagram illustrating an example of the overall configuration of the film removing apparatus of the present embodiment.
  • FIG. 2 (A) is a perspective view showing a part of a workpiece to be machined in the embodiment, and FIG. 2 (B) shows a state of film removal according to the embodiment.
  • # A A cross-sectional view taken along the line #A and viewed in the direction of the arrow.
  • the film removing apparatus of the present invention comprises: a dry ice supply device 10 for supplying dry ice in particle form; and dry ice particles supplied from the dry ice supply device 10 together with compressed air to a workpiece 40 to be processed. It is composed of an eaves 30 provided with a jet gun 50 for jetting.
  • the work 40 (processing target) that can be processed according to the present invention is only required to have a molded product whose surface is covered with a film (film or foil), and the material of the molded product is of various known types; Applicable.
  • a molded article a molded article made of a polycarbonate, an acrylic resin, an olefin resin, another thermoplastic resin, a thermosetting resin, or the like is used.
  • a coating material characters or patterns are formed on a metal film or foil made of aluminum or other metal, a resin film, or a foil provided on the film with a coloring pigment or the like. Thereafter, a foil having a multilayer structure obtained by peeling the foil from the film is used.
  • various known methods can be applied to the method of forming a film on the surface of a molded article. For example, a film is applied to a molded article, or the film itself is transferred, or the multilayered foil is applied. It may be a method of transferring, or a method of simultaneously performing resin molding and bonding of a coating, such as transfer molding or in-mold molding.
  • the shape and the processing portion of the work 40 are also arbitrary.
  • a metal-based material is placed on a plastic molded product 42 for a mobile phone housing.
  • the film provided with the film coating 4 is to be processed.
  • a large number of holes or openings are formed in the molded article 42, such as an opening 46A for the liquid crystal panel of a mobile phone, a hole 46B for various keys, and a hole 46C for a microphone.
  • the molded product 42 and the coating film 44 are shown separately for convenience of explanation. However, in practice, the opening 46A and the holes 46B, 46C are formed by molding. At the same time, it is closed by the coating 44 adhered (see Fig. 2 (B)).
  • the unnecessary coating covering the opening 46A and the holes 46B and 46C is removed by spraying particulate dry ice.
  • the dry ice supply device 10 includes a hopper 14 for accommodating the dry ice pellets 12, a weighing confirmation sensor 20 for weighing the dry ice pellets 12 sent from the tub 14 into a predetermined amount, A crushing device 2 2 for crushing the dry ice pellet 12 into particles having a predetermined particle size, a compressed air supply device 2 for compressing air to generate compressed air 2 It has four.
  • the pelletizer 28 will be described later.
  • the stirring blade 16 for stirring the stored dry ice pellets 12 so as not to form a lump, and the dry ice pellets 12 in the hopper 14 are detected to be less than a predetermined amount, and the drying is performed.
  • the dry ice pellets 12 to be accommodated are in a columnar shape with a diameter of 3 mm and a length of 2 mm or more: L 0 mm.
  • the crushing device 22 is capable of crushing the dry ice pellet 12 into particles having a desired particle size, but crushing the workpiece to 3.0 mm or less from the viewpoint of preventing the workpiece 40 from being damaged. It is convenient to set as follows. If the thickness is set to 0.0 lmm or less, the dry ice force S may be sublimated during sending to the injection gun 50 and may not be suitable for removing the film. By adjusting the particle size, it is possible to obtain a sufficient effect of removing the film.
  • the compressed air supply device 24 is for generating compressed air, and is sent to the injection gun 50 via a hose 27 to the generated compressed air. Then, after the compressed air and the dry ice particles 58 are mixed in the injection gun 50, they are sprayed toward the work 40. If the pressure of the compressed air (or blast air) is too high, the workpiece 40 will be damaged, and if it is too low, the dry ice particles 58 will bounce off the surface of the workpiece 40 and cannot be processed. For example, 0.05Mp s; Although it is set to about 0 Mps, it is convenient to set it to about 0.1 to 0.3 Mps in order to obtain better workability. In the present embodiment, the compressed air supply device 24 is provided in the dry ice supply device 10, but may be externally provided if necessary. Also, compressed air drying equipment A filter device or the like may be provided as needed.
  • the method of supplying the dry ice pellets 12 contained in the hopper 14 is arbitrary.
  • the liquefied carbon dioxide gas supplied from an external facility through a tank lorry or the like is processed into a dry ice pellet 12 at the installation side of the film removing device 10 to form the hopper 14. It may be accommodated in a container.
  • commercially available dry ice previously formed into pellets may be used, or the dry ice pellets may be removed from the carbon dioxide in the gas cylinder on the installation side of the film removing device 10. It is also possible to form the tray 12 and send it to the hopper 14.
  • Such a pelletizer and a dry ice manufacturing device are known technologies, and any of them may be used.
  • the processing booth 30 is for spraying dry ice particles 58 onto the workpiece 40 by an injection gun 50 to remove unnecessary coating.
  • a conveyor 34 for continuously transferring the workpiece 40 from the inlet 32 side to the outlet 34 side in the direction of the arrow is provided in the processing board 30.
  • the work 40 is sequentially conveyed at a predetermined speed by the conveyor 34 and passes through the spray position by the spray gun 50 to remove the coating.
  • nozzle type static eliminators 52 and 54 are provided on both sides of the injection gun 50. These static eliminators 52 and 54 blow the static elimination air toward the surface of the work 40 at the same time as the dry ice particles 58 are blown by the spray gun 50, and The static electricity generated by the collision between 40 and the dry ice particles 58 can be removed. Further, on the upper surface side of the processing board 30, there is provided an electrostatic removal device 56 for blowing static elimination air over the processing board 30. These static eliminators 52, 54, and 56 remove the static electricity in the processing booth 30, and the dust of the coating removed from the workpiece 40 removes the processed workpiece 40 and the inner surface of the processing booth 30. Can be prevented from adhering. The static eliminators 52 to 56 neutralize static electricity by applying air to the air to charge the air. Is knowledge.
  • a dust collecting filter 64 for collecting the dust of the film removed from the work 40 by spraying the dry ice particles 58 is provided inside the processing booth 30 and below the conveyor 34.
  • a blower 6 6 is provided inside the processing booth 30 and below the conveyor 34.
  • the blower 66 is actuated and air is sucked in, the dust of the unnecessary coating 44 removed from the molded article 42 is collected in the dust collecting filter 64, and the air and carbon dioxide are exhausted by the exhaust hose 6.
  • a part is discharged to the outside through an exhaust port 68 through a part 7, and a part is returned into the processing booth 30 by a circulation hose 69.
  • a static elimination air blowing device 62 for blowing dry static elimination air onto the workpiece 40 whose temperature has been reduced by spraying the dry ice crys 58 is provided near the exit 34 of the processing booth 30.
  • the static elimination air blowing device 62 includes a static eliminator 63 having the same configuration as the static eliminators 52 to 56 described above.
  • a predetermined amount of the dry ice pellets 12 is stored in the hopper 14.
  • the stirring blades 16 are rotating, which prevents the pellets from adhering to each other by the force S and acts to enable stable weighing.
  • the contained dry ice pellets 12 are sent to a crushing device 22 after a certain amount is measured by a measurement confirmation sensor 20. Since the empty sensor 18 is provided in the hopper 14, a warning is issued to the outside when the dry ice pellet 12 in the hopper 14 becomes less than a predetermined amount.
  • the dry ice pellet 1 2 sent to the crushing device 2 2 is used to remove the coating 4 4
  • the dry ice particles 58 having a suitable particle size are crushed and sent to a spray gun 50 via a hose 26.
  • the compressed air supply device 24 a drying process is performed as needed together with air compression.
  • the generated compressed air is sent to the injection gun 50 in the processing booth 30 via the hose 27, and the compressed air and the dry ice particles 58 are mixed in the injection gun 50.
  • the pressure of the compressed air is adjusted so that the dry ice particles 58 ejected from the injection gun 50 are given a momentum suitable for removing the coating 44.
  • the operation may be performed by the device 24 itself, or may be performed by providing a valve or the like in the hose 27 and adjusting the open / close state of the valve. Alternatively, it may be performed within the injection nozzle 50.
  • dry ice particles 58 are sequentially conveyed in the direction of the arrow at a predetermined speed by driving the conveyor 34 together with the compressed air sent from the compressed air supply device 24. Injected toward the target 40. At the same time as the dry ice particles 58 are sprayed, static elimination air is also blown from the static eliminators 52 and 54 toward the work area of the workpiece 40. Note that the injection flow rate of the compressed air and the injection amount of the dry ice are arbitrarily adjusted according to the size of the work 40 (the processing area) and the transport speed. Such adjustment of the flow rate, pressure, and dry ice injection amount of the compressed air are performed by operating an adjustment panel (not shown).
  • the dry ice particles 58 collide with the coating film 44 at high speed.
  • the coating 44 exists in the portion corresponding to the opening 46 A and the holes 46 B and 46 C of the molded product 42, and the dry ice particles 58 impact with only the coating 44.
  • the coating 4 4 peels off because it cannot withstand the impact.
  • the coating film 44 is not removed because the coating film 44 and the molded article 42 have a strong adhesive force. That is, the coating covering the opening 46A and the holes 46B and 46C is removed along the periphery of the opening 46A and the holes 46B and 46C.
  • the particle size of the dry ice particles 58 should be set to, for example, about 0.1 to 0.3 mm.
  • the dry ice sublimates while passing through the hose 26 to reduce the particle size.
  • the smallest hole 46 C having a diameter of about 0.1 ⁇ ⁇ removes the coating 44 along the periphery thereof. can do.
  • the dry ice particles 58 that collided with the coating 44 sublimated at the same time as the collision, and the rapid expansion of the volume and the general shock at that time made it possible to remove the coating having fine irregularities. Therefore, it can be finished with high precision as shown in FIG.
  • the coating 44 removed from the molded product 42 as described above is blown off by the compressed air and removed from the surface of the work 40.
  • the static elimination air is blown from the static elimination devices 52 and 54, it is possible to prevent the dust of the removed coating 44 from adhering to the work surface 40 due to static electricity.
  • the static eliminator 56 on the upper surface side also sprays a static eliminator, so that the dust of the coating 44 on the inside of the processing booth 30 is also prevented. You.
  • the particle size of the dry ice particles 58 can be adjusted to 0.01 mm to 3.0 mm by the fracture frame device 22, so that the particle size can be adjusted according to the type and shape of the workpiece 40,
  • the coating 44 can be accurately removed without damaging the mask 40.
  • the coating 44 covering small holes for example, holes having a diameter of about 1.0 mm to 5 mm
  • the finish can be removed well.
  • stirring blades 16 are provided in the hopper 14, it is possible to prevent the lump of dry ice pellets 12 from being formed in the hopper 14 and to supply the pellets to the crushing device 22 in a circular manner. it can.
  • the pressure of the compressed air injected from the injection gun 50 is adjusted to 0.05 Mp s to 1.OMp s, more preferably to 0.1 Mp s to 0.3 Mp s, the work The coating 44 can be removed without damaging the coating 40.
  • the conveyor 40 is transported sequentially by the conveyor 34, and a static elimination air blowing device 62 is provided near the outlet 34 of the processing booth 30.
  • the surface was dried by blowing dry air from which electricity was removed, and the temperature was returned to room temperature before being taken out of the processing booth 30. For this reason, removal of fine powder by electrostatic adhesion and rapid temperature change As a result, it is possible to prevent water droplets from adhering to the work 40 due to condensation.
  • the present invention has many embodiments, and can be variously modified based on the above disclosure. For example, the following are included.
  • a dry ice supply device 10 is provided in the dry ice supply device 10 by providing a pelletizer 28 in the dry ice supply device 10 and supplying the dry ice pellets 12 generated by the pelletizer 28 to the hopper 14. Production and supply of dry ice may be performed.
  • the dry ice particles 58 and the compressed air are mixed in the injection gun 50.However, the compressed air generated by the compressed air supply device 24 is directly sent to the hose 26. Thus, the two may be mixed before reaching the injection gun 50.
  • a configuration in which the dry ice particles 58 are sent to the injection gun 50 by compressed air may be adopted.
  • the particulate dry ice 58 was sprayed from the spray gun 50 toward the tip 40.
  • powdered dry ice carbon dioxide snow, powder dry ice, carbon dioxide snow, Similar effects can be obtained by using dry ice snow, particle snow, snow dry).
  • the dry ice supply device 10 may have a known configuration such that the liquefied carbon dioxide gas is adiabatically expanded to turn the dry ice into powder.
  • the plastic molded article for the housing of the mobile phone has been described as an example of the work 40, but the present invention is applicable to any molded article having a film formed on its surface.
  • it can be applied to molded articles used for any purpose.
  • the materials of the molded product and the coating may be appropriately changed as necessary.
  • the opening 42 of the molded product 42 and the hole 46 were formed.
  • the coating 44 covering B and 46 C was removed along the periphery, but this is also an example.
  • the present invention can be applied to the case where the coating 74 protrudes from the edge of the molded product 72 as in the case of the work 70 shown in FIG. 2 (D), that is, when the burr 76 is generated. Can be applied, and deburring (or trimming) can be accurately performed by spraying dry ice particles 58 or powdery dry ice.
  • the particle size of the dry ice particles 58, the pressure and the flow rate of the compressed air are also examples, and can be appropriately changed according to the material of the work 40, the processing portion, the processing speed, and the like.
  • the workpiece 40 was automatically transferred to the position of the fixed injection gun 50 by the comparator 34, but the method of transporting the workpiece 40 is arbitrary. May be appropriately changed so as to achieve the effect of (1).
  • one or a plurality of works 40 may be carried to the position of the injection gun 50 by a mouth pot arm or the like, and may be carried out of the processing booth 30 again by the arm after the processing.
  • the work 40 is conveyed in one direction by the conveyor 34.
  • the work 40 may be reciprocated within the range of the dry ice particles 58 sprayed by the force spray gun 50. Good.
  • the processing can be performed smoothly. It is convenient. Alternatively, the processing may be performed in a batch manner, or the work 40 may be placed on a rotating evening table, and the dry ice particles 58 may be sprayed on the entire work 40 by rotating the table. You may do it. Further, the work 40 may be fixed and the injection gun 50 may be movable. At this time, a plurality of movable injection guns may be provided to inject dry ice particles from a plurality of directions, or the injection gun may be reciprocated to change the injection angle according to the direction of movement. Good.
  • the dry ice particles 58 were sprayed from the coating 44 side of the work 40, but the spraying direction is arbitrary, and the dry ice particles 58 are sprayed from either the front or back surface of the molded product 42.
  • a plurality of spray nozzles may be provided to spray dry ice particles 58 simultaneously from multiple directions.
  • dry ice in the form of particles or powder is blown together with compressed air at a predetermined pressure and flow rate onto a molded product to be processed.
  • Unnecessary film covering the molded product can be accurately removed without damaging the surface.
  • static electricity removing means shall be provided in the processing booth to prevent the dust of the removed film from adhering to the molded product, and to collect the dust of the film removed by the dust collecting means. Therefore, there is little effect on the human body and there is no need for post-processing.
  • the diameter of the dry ice particles can be adjusted, it can be applied to work for removing fine parts.
  • the film can be removed along the periphery of the hole. That is, since drilling and deburring can be performed at the same time, the number of work steps is small, and work efficiency is improved. Can be achieved.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cleaning In General (AREA)

Abstract

L'invention concerne un appareil et un procédé d'élimination d'une partie non désirée de revêtement sur une surface d'un article moulé. En particulier, l'invention concerne un appareil et un procédé dans lesquels : de la glace sèche est réduite à l'état de granules ou de poudre ; un jet de granules ou de poudre avec de l'air comprimé est appliqué sur la surface de l'article moulé en tant qu'objet à traiter positionné dans un compartiment de traitement ; la poussière de revêtement éliminée par l'application du jet est retirée par aspiration au moyen d'un collecteur de poussière ; et les charges statiques produites par la collision de la glace sèche avec l'objet à traiter sont éliminées par un moyen d'élimination statique.
PCT/JP2004/002972 2004-03-08 2004-03-08 Appareil et procede d'elimination de revetement d'article moule WO2005084911A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2004/002972 WO2005084911A1 (fr) 2004-03-08 2004-03-08 Appareil et procede d'elimination de revetement d'article moule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2004/002972 WO2005084911A1 (fr) 2004-03-08 2004-03-08 Appareil et procede d'elimination de revetement d'article moule

Publications (1)

Publication Number Publication Date
WO2005084911A1 true WO2005084911A1 (fr) 2005-09-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102380491A (zh) * 2011-08-01 2012-03-21 迪普干冰制造(大连)有限公司 一种加热吸尘搭配干冰清洗的表面脱漆处理设备及方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62273090A (ja) * 1986-05-19 1987-11-27 三菱電機株式会社 除塵装置
JPH0722193A (ja) * 1993-06-28 1995-01-24 Honda Motor Co Ltd 樹脂成形品の除塵装置
JPH11240024A (ja) * 1998-02-25 1999-09-07 Toyoda Gosei Co Ltd 合成樹脂のトリミング方法及びその装置
JP2001210661A (ja) * 2000-01-24 2001-08-03 Nec Corp 樹脂モールド部のバリ取り装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62273090A (ja) * 1986-05-19 1987-11-27 三菱電機株式会社 除塵装置
JPH0722193A (ja) * 1993-06-28 1995-01-24 Honda Motor Co Ltd 樹脂成形品の除塵装置
JPH11240024A (ja) * 1998-02-25 1999-09-07 Toyoda Gosei Co Ltd 合成樹脂のトリミング方法及びその装置
JP2001210661A (ja) * 2000-01-24 2001-08-03 Nec Corp 樹脂モールド部のバリ取り装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102380491A (zh) * 2011-08-01 2012-03-21 迪普干冰制造(大连)有限公司 一种加热吸尘搭配干冰清洗的表面脱漆处理设备及方法

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