WO2012008601A1 - 中空成形品の製造方法及び装置 - Google Patents
中空成形品の製造方法及び装置 Download PDFInfo
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- WO2012008601A1 WO2012008601A1 PCT/JP2011/066316 JP2011066316W WO2012008601A1 WO 2012008601 A1 WO2012008601 A1 WO 2012008601A1 JP 2011066316 W JP2011066316 W JP 2011066316W WO 2012008601 A1 WO2012008601 A1 WO 2012008601A1
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- WIPO (PCT)
- Prior art keywords
- mold
- resin
- hollow molded
- jig
- resin layer
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- 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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/006—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor using an electrostatic field for applying the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
-
- 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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/08—Coating a former, core or other substrate by spraying or fluidisation, e.g. spraying powder
-
- 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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/42—Removing articles from moulds, cores or other substrates
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3064—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062
- B29C2949/3074—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062 said at least one component obtained by coating
- B29C2949/3076—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062 said at least one component obtained by coating on the inside
-
- 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
- B29C37/0067—Using separating agents during or after moulding; Applying separating agents on preforms or articles, e.g. to prevent sticking to each other
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06—Injection blow-moulding
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/58—Blowing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2103/00—Use of resin-bonded materials as moulding material
- B29K2103/04—Inorganic materials
- B29K2103/06—Metal powders, metal carbides or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2022/00—Hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7158—Bottles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7158—Bottles
- B29L2031/716—Bottles of the wide mouth type, i.e. the diameters of the bottle opening and its body are substantially identical
Definitions
- the present invention relates to a method and an apparatus for manufacturing a hollow molded product that is manufactured by spraying a molding material into a mold on the basis of electrostatic coating.
- thermoplastic viscous resin is extruded into a pipe shape, a direct blow molding in which it is expanded by air blow, or a test tube preform is formed by injection molding, and then is expanded by air blow or the like. It is manufactured by injection blow molding.
- Direct blow molding can be molded only with a female mold, and by simultaneously extruding a plurality of resins, a hollow molded product in which resins are laminated can be manufactured at a low cost.
- injection blow molding since a preform is formed by injection molding, the product weight and thickness of the final molded product are stable, and a mass-produced product can be manufactured efficiently.
- blow moldings are performed by stretching the resin, there is a problem that a thick portion and a thin portion of the resin are formed depending on the stretch amount (blow ratio).
- these molding methods require kneading while heating in the previous stage of blow molding in order to make the viscosity of the resin uniform and to degas bubbles in the molten resin, which requires a large amount of thermal energy. There are also problems such as.
- the plastic product molding apparatus disclosed in Patent Document 1 also requires an ejector 72 or the like for releasing the solidified resin layer, that is, the target molded product from the mold.
- the ejector 72 is required to have enough strength to withstand the mechanical load applied to the target molded product when the target molded product is detached from the mold, and it is impossible to obtain a thin molded product such as a thin film.
- the plastic product molding apparatus disclosed in Patent Document 1 further requires a step of cooling the heated mold in order to facilitate separation of the product by utilizing the difference in heat shrinkage between the mold and the plastic. Furthermore, a pretreatment such as applying a liquid release agent to the mold is necessary.
- the present invention has been made in view of the above-described problems relating to the conventional method for producing a hollow molded article, and it is possible to easily and efficiently produce an extremely thin hollow molded article having a uniform thickness.
- An object of the present invention is to provide a method and an apparatus for producing a hollow molded product.
- Another object of the present invention is to provide a method and an apparatus for producing a hollow molded article with a low energy cost.
- the present invention further eliminates the need for internal pressure in the mold during molding and does not require clamping pressure, so that a metal with high hardness is not required for the mold, and any conductive material such as a conductive resin can be used. It is an object of the present invention to provide a method and an apparatus for manufacturing a hollow molded article that can be used in a certain manner and can reduce the weight and cost of a mold. It is another object of the present invention to provide a method and apparatus for manufacturing a hollow molded article having a small number of mechanical driving parts, extremely high safety during molding, and high shape fidelity.
- the first invention is A spraying step of forming a resin layer by spraying a liquid resin having a potential difference with respect to the mold from a spray jig inserted from the mouth of the mold into a mold that can be divided into two or more.
- a solidifying step for solidifying the resin layer The mold is opened with respect to the spray jig, and the mold release step of releasing the solidified resin layer from the mold while being held by the spray jig, and the resin layer held by the spray jig is It is a manufacturing method of the hollow molded article characterized by including the removal step removed from a spraying jig.
- the second invention is A spraying step of forming a resin layer by spraying a liquid resin having a potential difference with respect to the mold from a spray jig inserted from the mouth of the mold into a mold that can be divided into two or more.
- It is a manufacturing method of the hollow molded product characterized by including the removal step which removes the made resin layer from the said spraying jig.
- the third invention is A mold that can be divided into two or more, A spray jig inserted from the mouth of the mold, the spray jig for spraying a charged liquid resin having a potential difference to the mold to form a resin layer on the inner surface of the mold; Mold driving means for opening the mold with respect to the spray jig and releasing the solidified resin layer from the mold while being held by the spray jig; An apparatus for producing a hollow molded article, comprising: a removing means for removing the resin layer held by the spray jig from the spray jig.
- the fourth invention is A mold that can be divided into two or more, A spray jig inserted from the mouth of the mold, the spray jig for spraying a charged liquid resin to form a resin layer on the inner surface of the mold; A solidified electromagnetic radiation jig that is arranged in place of the spray jig and emits a solidified electromagnetic wave; A mold driving means for opening the mold with respect to the solidified electromagnetic wave radiation jig and releasing the solidified resin layer from the mold while being held by the solidified electromagnetic wave radiation jig; An apparatus for producing a hollow molded article, comprising: a removing means for removing the resin layer held by the solidified electromagnetic radiation jig from the spray jig.
- the method and apparatus for producing a hollow molded article of the present invention it is possible to obtain an effect that an extremely thin hollow molded article having a uniform thickness can be produced easily, efficiently and stably. According to the method and apparatus for producing a hollow molded article of the present invention, it is also possible to obtain an effect that the cost of energy to be used is small.
- any conductive material such as polyacetylene, which is a conductive resin, can be used.
- resin using gold powder, silver powder, copper powder, nickel powder, aluminum powder, plating powder, carbon powder, graphite powder, etc. as conductive filler, reducing the weight and cost of the mold. The effect which can be aimed at can be acquired.
- a resin subjected to conductive plating can also be used.
- thermoplastic resin or thermosetting resin that is solid at room temperature.
- thermoplastic resins or thermosetting resins need to be kneaded with a coloring material using a screw.
- a difference in the flow of the molten resin and the colorant or additive occurs in the resin flow path, and a problem in terms of product appearance or function such as weld or poor dispersion tends to occur.
- a resin raw material that is liquid at room temperature such as an ultraviolet curable resin or an emulsion
- it is possible to previously blend colorants and additives such as pigments and dyes. Since the resin sprayed from the spray nozzle does not pass through the flow path and reaches the mold surface while being uniformly dispersed by the electric repulsive force between the resins, there is little possibility of problems such as welds and poor dispersion.
- Embodiments of the present invention are as follows.
- the spraying step is performed a plurality of times to form a plurality of resin layers.
- the resin is a thermosetting resin
- the mold heated in the spraying step is used, and the solidification step is performed simultaneously with the spraying step.
- the resin is an ultraviolet curable resin;
- the solidified electromagnetic wave radiation jig irradiates the resin layer with ultraviolet rays.
- the resin is a photo-curing resin;
- the solidified electromagnetic wave radiation jig irradiates visible light to the resin layer.
- the resin is a thermoplastic resin
- the resin is an emulsion resin;
- the emulsion solvent is vaporized in the mold.
- the charge of the mold is made equal to the charge of the solidified resin layer.
- the mold is positively charged and the resin is negatively charged.
- the mold is negatively charged and the resin is positively charged.
- the mold is grounded, and the resin is negatively charged.
- the mold is grounded, and the resin is positively charged.
- the mold is made of metal or conductive resin.
- the mold is positively charged and the resin is negatively charged.
- the mold is negatively charged and the resin is positively charged.
- the mold is grounded, and the resin is negatively charged.
- the mold is grounded, and the resin is positively charged.
- composition explanatory drawing of the manufacturing apparatus of the hollow molded product of 1st Embodiment of this invention It is composition explanatory drawing which shows the spraying state of the manufacturing apparatus of the hollow molded article of 1st Embodiment of this invention. It is composition explanatory drawing which shows the mold open state of the manufacturing apparatus of the hollow molded product of 1st Embodiment of this invention. It is composition explanatory drawing which shows the spraying state of the manufacturing apparatus of the hollow molded product of 2nd Embodiment of this invention. It is composition explanatory drawing which shows the solidification state of the manufacturing apparatus of the hollow molded product of 2nd Embodiment of this invention. It is composition explanatory drawing which shows the mold open state of the manufacturing apparatus of the hollow molded product of 2nd Embodiment of this invention.
- the apparatus for manufacturing a hollow molded product according to the first embodiment has a gap tolerance of 0.2 mm or less at a mouth portion 12 of a bottle mold 10 that can be divided into two parts, and is insulated by an insulator 14.
- the nozzle portion 16 is arranged.
- the nozzle part 16 has a nozzle body 20 which is a spray nozzle of an electrostatic spray gun generally used in electrostatic coating.
- the nozzle body 20 is grounded and a high voltage of 10 kV is applied to the bottle mold 10 to form an electrostatic field.
- a molding resin containing no negatively charged binder is sprayed from the nozzle portion 16.
- the molding resin forms a molding resin layer 22 having a uniform thickness of 0.01 to 2.0 mm, preferably 0.05 to 0.6 mm, on the inner surface of the bottle mold 10.
- the resin layer 22 is brought into close contact with the inner surface of the bottle mold 10 by electrostatic force.
- molding resin materials include epoxy resins, melamine resins, phenol resins, alkyd resins, amino alkyd resins, vinyl resins, acrylic resins, urethane resins, silicon resins, silicon resins, fluorine resins, urea resins, polyacetal resins, Examples thereof include olefin resins, styrene resins, vinyl chloride resins, polyester resins, polyamide resins, cellulose, and drying oil.
- the bottle mold 10 is divided and opened in two around the fixed nozzle portion 16, and remains attached to the molded resin layer 22.
- the molded resin layer 20 is removed from the nozzle portion 16 to form a bottle.
- the average thickness of the molded resin layer 22, that is, the bottle is 0.6 mm.
- the manufacturing apparatus for a hollow molded product according to the second embodiment has a clearance tolerance of 0.2 mm or less at the mouth 112 of the bottle mold 110 that can be divided into two as in the first embodiment.
- the nozzle part 116 insulated by the insulator 114 is arranged.
- an ultraviolet curable resin not containing a negatively charged binder is sprayed from the nozzle body 116.
- the ultraviolet curable molding resin forms a molding resin layer 122 having a uniform thickness on the inner surface of the bottle mold 110, and the molding resin layer 122 is brought into close contact with the surface of the bottle mold 110 by electrostatic force.
- the ultraviolet irradiating unit 150 emits ultraviolet rays having a wavelength of 200 to 450 nm, has a cross section of the same shape as the nozzle unit 116, and has a transparent transparency with a gap tolerance of 0.2 mm or less from the mold opening. It has a body 152.
- the bottle mold 110 is divided and opened in two parts around the fixed ultraviolet irradiation unit 150, and the molded resin layer 122 remains attached to the ultraviolet irradiation unit 150.
- the molded resin layer 122 is removed from the ultraviolet irradiation unit 150 and becomes a bottle.
- the resin spraying step and the solidifying step are each one step, and each step is repeated a plurality of times to obtain a laminated molded product.
- an ultraviolet curable resin is used, but other photocurable resins can also be used.
- the bottle mold is always heated to 100 ° C. or more, an aqueous emulsion not containing a binder that adheres to the metal is electrostatically sprayed, and moisture is evaporated by the heat of the bottle mold to solidify the resin.
- the mold is always cooled to 20 ° C. or lower, and a thermoplastic resin such as polyethylene or polypropylene is electrostatically sprayed in a molten state, and the resin is solidified by cooling with a bottle mold.
- a thermoplastic resin such as polyethylene or polypropylene
- the spray nozzle is changed to a spray gun generally used in powder coating
- the raw material to be sprayed is a thermosetting resin, and sprayed on the inner surface of the bottle mold that is constantly heated to the solidification temperature of the resin, The resin is solidified. Since these methods do not require repeated heating and cooling of the mold, energy loss can be minimized. At the same time, it is not necessary to wait until the temperature of the bottle mold is heated or cooled to the temperature required in the next process, so that there is an advantage that the productivity per bottle mold is high.
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- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
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- Oral & Maxillofacial Surgery (AREA)
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Abstract
Description
また、これらの成形方法は、樹脂の粘性を均一化するため、溶融樹脂内の気泡を脱気するために、ブロー成形の前段階において過熱しながら混練する必要があり、多大な熱エネルギーを必要とするなどの問題もある。
本発明は、従来の中空成形品の製造方法に関する上述した問題点に鑑みてなされたものであって、均一な厚さの極めて薄い中空成形品を容易に効率的に安定して製造することができる中空成形品の製造方法及び装置を提供することを目的とする。
本発明はまた、使用するエネルギーのコストが小さい中空成形品の製造方法及び装置を提供することを目的とする。
本発明はさらに、機械的な駆動部が少なく、成形時の安全性が非常に高く、形状忠実度性が高い中空成形品の製造方法及び装置を提供することを目的とする。
二つ以上に分割が可能な金型の内部に、該金型の口部から挿入した噴霧治具から、前記金型に対し電位差を有する液状の樹脂を噴霧して樹脂層を形成する噴霧ステップ、
前記樹脂層を固化する固化ステップ、
前記噴霧治具に対し前記金型を開き、固化した前記樹脂層を前記噴霧治具に保持したまま前記金型から離型する離型ステップ、及び
前記噴霧治具に保持された樹脂層を前記噴霧治具から取り外す取り外しステップ
からなることを特徴とする中空成形品の製造方法
である。
二つ以上に分割が可能な金型の内部に、該金型の口部から挿入した噴霧治具から、前記金型に対し電位差を有する液状の樹脂を噴霧して樹脂層を形成する噴霧ステップ、
前記噴霧治具に代えて配置された固化電磁波放射治具によって前記樹脂層を固化する固化ステップ、
前記固化電磁波放射治具に対し前記金型を開き、固化した前記樹脂層を前記固化電磁波放射治具に保持したまま前記金型から離型する離型ステップ、及び
前記固化電磁波放射治具に保持された樹脂層を前記噴霧治具から取り外す取り外しステップ
からなることを特徴とする中空成形品の製造方法
である。
二つ以上に分割が可能な金型と、
該金型の口部から挿入した噴霧治具であって、前記金型に対し電位差を有する帯電した液状の樹脂を噴霧して前記金型内面に樹脂層を形成する噴霧治具と、
前記噴霧治具に対し前記金型を開き、固化した前記樹脂層を前記噴霧治具に保持したまま前記金型から離型させる金型駆動手段と、
前記噴霧治具に保持された樹脂層を前記噴霧治具から取り外す取り外し手段と
を有することを特徴とする中空成形品の製造装置
である。
二つ以上に分割が可能な金型と、
該金型の口部から挿入した噴霧治具であって、帯電した液状の樹脂を噴霧して前記金型内面に樹脂層を形成する噴霧治具と、
前記噴霧治具に代えて配置されて固化電磁波を放射する固化電磁波放射治具と、
前記固化電磁波放射治具に対し前記金型を開き、固化した前記樹脂層を前記固化電磁波放射治具に保持したまま前記金型から離型させる金型駆動手段と、
前記固化電磁波放射治具に保持された樹脂層を前記噴霧治具から取り外す取り外し手段とを有することを特徴とする中空成形品の製造装置
である。
本発明の中空成形品の製造方法及び装置によればまた、使用するエネルギーのコストが小さい効果を得ることができる。
本発明の中空成形品の製造方法及び装置によればさらに、機械的な駆動部が少なく、大きな駆動力を要せず、成形時の安全性を非常に高くすることができる効果を得ることができる。
本発明において、紫外線硬化樹脂やエマルジョン等、常温で液体の樹脂原料を使用した場合、顔料や染料などの着色材や添加材をあらかじめブレンドしておくことが可能である。噴霧ノズルより噴霧された樹脂は流路を通ることなく、樹脂どうしの電気的反発力によって均一に分散しながら金型表面に到達するため、ウェルドや分散不良といった問題は発生するおそれは少ない。
第1発明及び第2発明において、噴霧ステップを複数回行い、複数の樹脂層を形成することを特徴とする。
樹脂が熱硬化樹脂であり、噴霧ステップにおいて加熱した前記金型を使用し、固化ステップが前記噴霧ステップと同時に行われることを特徴とする。
前記樹脂が紫外線硬化樹脂であり、
前記固化ステップにおいて前記固化電磁波放射治具が前記樹脂層に紫外線を照射することを特徴とする。
前記樹脂が光硬化樹脂であり、
前記固化ステップにおいて前記固化電磁波放射治具が前記樹脂層に可視光を照射することを特徴とする。
前記樹脂が熱可塑性樹脂であり、
前記噴霧ステップにおいて冷却した前記金型を使用し、
前記固化ステップと前記噴霧ステップが同時に行われることを特徴とする。
前記樹脂がエマルジョン樹脂であり、
前記噴霧ステップにおいて前記金型内でエマルジョン溶剤を気化させることを特徴とする。
前記離型ステップにおいて、前記金型の電荷を固化した前記樹脂層の電荷と同一にしたことを特徴とする。
前記金型が正に帯電し、樹脂が負に帯電していることを特徴とする。
前記金型が負に帯電し、樹脂が正に帯電していることを特徴とする。
前記金型がアースされ、樹脂が負に帯電していることを特徴とする。
前記金型がアースされ、樹脂が正に帯電していることを特徴とする。
前記金型が、金属製または導電性樹脂製であることを特徴とする。
前記金型が正に帯電し、樹脂が負に帯電していることを特徴とする。
前記金型が負に帯電し、樹脂が正に帯電していることを特徴とする。
前記金型がアースされ、樹脂が負に帯電していることを特徴とする。
前記金型がアースされ、樹脂が正に帯電していることを特徴とする。
第1実施形態の中空成形品の製造装置は、図1に示すように、二つに分割できるボトル金型10の口部12に、隙間公差が0.2mm以下であって絶縁体14によって絶縁されたノズル部16を配置してなる。ノズル部16は、静電塗装で一般的に使用される静電スプレーガンの噴霧ノズルであるノズルボデー20を有する。ノズルボデー20は、接地し、ボトル金型10に10kVの高電圧を加えて静電界を形成する。
第2実施形態の中空成形品の製造装置は、図4に示すように、第1実施形態と同様に、二つに分割できるボトル金型110の口部112に、隙間公差が0.2mm以下の絶縁体114によって絶縁されたノズル部116を配置してなる。第2実施形態の中空成形品の製造装置においては、ノズル体116より、マイナスに帯電したバインダーを含まない紫外線硬化樹脂を噴霧する。紫外線硬化成形樹脂は、ボトル金型110の内面に均一な厚さの成形樹脂層122を形成し、該成形樹脂層122は静電気力によってボトル金型110面に密着させられる。
第1実施形態及び第2実施形態は、樹脂の噴霧工程及び固化工程が各1工程であるが、それぞれの工程を複数回繰り返して積層成形品を得る。
これらの方法は、金型の加熱と冷却を繰り返し行う必要が無いため、エネルギーの損失を最小限に抑えられる。同時に、ボトル金型の温度が次工程で要求される温度まで加熱、あるいは冷却されるまで待つ必要もないため、ボトル金型一個当たりの生産性が高いという利点も持つ。
12、112 口部
14、114 絶縁体
16、116 ノズル部
20、120 ノズルボデー
22、122 成形樹脂層
Claims (19)
- 二つ以上に分割が可能な金型の内部に、該金型の口部から挿入した噴霧治具から、前記金型に対し電位差を有する液状の樹脂を噴霧して樹脂層を形成する噴霧ステップ、
前記樹脂層を固化する固化ステップ、
前記噴霧治具に対し前記金型を開き、固化した前記樹脂層を前記噴霧治具に保持したまま前記金型から離型する離型ステップ、及び
前記噴霧治具に保持された樹脂層を前記噴霧治具から取り外す取り外しステップ
からなることを特徴とする中空成形品の製造方法。 - 二つ以上に分割が可能な金型の内部に、該金型の口部から挿入した噴霧治具から、前記金型に対し電位差を有する液状の樹脂を噴霧して樹脂層を形成する噴霧ステップ、
前記噴霧治具に代えて配置された固化電磁波放射治具によって前記樹脂層を固化する固化ステップ、
前記固化電磁波放射治具に対し前記金型を開き、固化した前記樹脂層を前記固化電磁波放射治具に保持したまま前記金型から離型する離型ステップ、及び
前記固化電磁波放射治具に保持された樹脂層を前記噴霧治具から取り外す取り外しステップ
からなることを特徴とする中空成形品の製造方法。 - 前記噴霧ステップを複数回行い、複数の樹脂層を形成することを特徴とする請求項1又は2に記載の中空成形品の製造方法。
- 前記樹脂が熱硬化樹脂であり、
前記噴霧ステップにおいて加熱した前記金型を使用し、
前記固化ステップが前記噴霧ステップが同時に行われることを特徴とする請求項1又は3に記載の中空成形品の製造方法。 - 前記樹脂が紫外線硬化樹脂であり、
前記固化ステップにおいて前記固化電磁波放射治具が前記樹脂層に紫外線を照射することを特徴とする請求項2又は3に記載の中空成形品の製造方法。 - 前記樹脂が光硬化樹脂であり、
前記固化ステップにおいて前記固化電磁波放射治具が前記樹脂層に可視光を照射することを特徴とする請求項2又は3に記載の中空成形品の製造方法。 - 前記樹脂が熱可塑性樹脂であり、
前記噴霧ステップにおいて冷却した前記金型を使用し、
前記固化ステップと前記噴霧ステップが同時に行われることを特徴とする請求項1又は3に記載の中空成形品の製造方法。 - 前記樹脂がエマルジョン樹脂であり、
前記噴霧ステップにおいて前記金型内でエマルジョン溶剤を気化させることを特徴とする請求項1又は2又は3に記載の中空成形品の製造方法。 - 前記離型ステップにおいて、前記金型の電荷を固化した前記樹脂層の電荷と同一にしたことを特徴とする請求項1又は2に記載の中空成形品の製造方法。
- 前記金型が正に帯電し、樹脂が負に帯電していることを特徴とする請求項1又は2に記載の中空成形品の製造方法。
- 前記金型が負に帯電し、樹脂が正に帯電していることを特徴とする請求項1又は2に記載の中空成形品の製造方法。
- 前記金型がアースされ、樹脂が負に帯電していることを特徴とする請求項1又は2に記載の中空成形品の製造方法。
- 前記金型がアースされ、樹脂が正に帯電していることを特徴とする請求項1又は2に記載の中空成形品の製造方法。
- 二つ以上に分割が可能な金型と、
該金型の口部から挿入した噴霧治具であって、前記金型に対し電位差を有する帯電した液状の樹脂を噴霧して前記金型内面に樹脂層を形成する噴霧治具と、
前記噴霧治具に対し前記金型を開き、固化した前記樹脂層を前記噴霧治具に保持したまま前記金型から離型させる金型駆動手段と、
前記噴霧治具に保持された樹脂層を前記噴霧治具から取り外す取り外し手段と
を有することを特徴とする中空成形品の製造装置。 - 二つ以上に分割が可能な金型と、
該金型の口部から挿入した噴霧治具であって、帯電した液状の樹脂を噴霧して前記金型内面に樹脂層を形成する噴霧治具と、
前記噴霧治具に代えて配置されて固化電磁波を放射する固化電磁波放射治具と、
前記固化電磁波放射治具に対し前記金型を開き、固化した前記樹脂層を前記固化電磁波放射治具に保持したまま前記金型から離型させる金型駆動手段と、
前記固化電磁波放射治具に保持された樹脂層を前記噴霧治具から取り外す取り外し手段と
を有することを特徴とする中空成形品の製造装置。 - 前記金型が、金属製又は導電性樹脂製であることを特徴とする請求項9に記載の中空成形品の製造装置。
- 前記金型が正に帯電し、樹脂が負に帯電していることを特徴とする請求項12又は13に記載の中空成形品の製造装置。
- 前記金型が負に帯電し、樹脂が正に帯電していることを特徴とする請求項12又は13に記載の中空成形品の製造装置。
- 前記金型がアースされ、樹脂が負に帯電していることを特徴とする請求項12又は13に記載の中空成形品の製造装置。
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US13/702,554 US20130075960A1 (en) | 2010-07-16 | 2011-07-19 | Manufacturing Method and Apparatus for a Hollow Molded Part |
CN201180028672.8A CN102958660B (zh) | 2010-07-16 | 2011-07-19 | 中空成型品的制造方法和装置 |
KR1020127031968A KR101408413B1 (ko) | 2010-07-16 | 2011-07-19 | 중공 성형품의 제조 방법 및 장치 |
EP11806931.9A EP2594383B1 (en) | 2010-07-16 | 2011-07-19 | Method for forming hollow molded product |
ES11806931.9T ES2616962T3 (es) | 2010-07-16 | 2011-07-19 | Método para conformar un producto moldeado hueco |
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EP2594383A4 (en) | 2015-01-07 |
JP5694698B2 (ja) | 2015-04-01 |
KR20130021402A (ko) | 2013-03-05 |
JP2012020539A (ja) | 2012-02-02 |
EP2594383A1 (en) | 2013-05-22 |
CN102958660A (zh) | 2013-03-06 |
US20130075960A1 (en) | 2013-03-28 |
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