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WO1999001270A1 - Procede de moulage et de production d'articles d'acryliques ou de polymetacrylates charge de trihydroxyde d'aluminium moules avec protection du moule par un film de polyethylene - Google Patents

Procede de moulage et de production d'articles d'acryliques ou de polymetacrylates charge de trihydroxyde d'aluminium moules avec protection du moule par un film de polyethylene Download PDF

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Publication number
WO1999001270A1
WO1999001270A1 PCT/TR1998/000012 TR9800012W WO9901270A1 WO 1999001270 A1 WO1999001270 A1 WO 1999001270A1 TR 9800012 W TR9800012 W TR 9800012W WO 9901270 A1 WO9901270 A1 WO 9901270A1
Authority
WO
WIPO (PCT)
Prior art keywords
mould
acrylic
male
product
over
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/TR1998/000012
Other languages
English (en)
Inventor
F. Mehmet Yaman
Turhan Karaoda
Derya TÜRKES
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.)
POLIFEN KIMYA SANAYI VE TICARET AS
Original Assignee
POLIFEN KIMYA SANAYI VE TICARET AS
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 POLIFEN KIMYA SANAYI VE TICARET AS filed Critical POLIFEN KIMYA SANAYI VE TICARET AS
Priority to AU79527/98A priority Critical patent/AU7952798A/en
Priority to TR2000/00083T priority patent/TR200000083T2/xx
Publication of WO1999001270A1 publication Critical patent/WO1999001270A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/68—Release sheets
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/001—Shaping in several steps
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum

Definitions

  • This invention is about obtaining cast forms by "polymerisation in mould” from mixture ATH (aluminiumtrihydroxide) padded, acrylic or polymethacrylate based, by using protecting polyethylene fail in mould.
  • ATH aluminiumtrihydroxide
  • LN polymerisation in the mould method generally, moulds made up of two parts where casting can be done to the empty space between them are used. These are stated as male and female as well. In these moulds made up of two parts of one up and one down generally the male part is placed at the down in casting, so that it forms the usage surface of the product.
  • the up and down mould parts, before the casting process, are closed over one another tightly by leaving a space between them for the material to be poured or in other words, by leaving an interim as much as the wall thickness of the completed (finished) product.
  • ATH aluminiumtrihydroxide
  • quartz sand calcite types
  • crystobalite etc..
  • Acrylic and methacrylate polymers, copolymers and their derivations, polyester or acrylic modified polyester resines, polyurethane resines, epoxy resiness, etc.. materials are used as binders with the filling material.
  • the products manufactured are used in various fields of industry.
  • all kinds of sanitary ware materials obtained by casting e.g. washbasins, basins, shower basins, bath basins, kitchen bench; etc.
  • product used in electric industry isolators, adapters, bridge, connections, etc..
  • various products used in construction industry interior and exterior face covering elements, decorative goods, columns, etc..
  • the surface of the mould to be used should be in ideal flat, should be as smooth as a mirror for instance.
  • “material's tightening the mould that it has been casted” problem can be observed during the polymerisation period reason of it is the volume getting smaller (shrinkage) in material. This problem leads the product not to be separated from the mould or deformation of surface quality, after the polymerisation has been finished.
  • special moulds are used which are produced by "galvano technology" at high costs (e.g.
  • a 20% of reduction in volume performs while the polymerisation reaction of acrylics are developing.
  • this reduction in order to follow the shrinkage in the mould, by the help of a system that can be programmed and such a program can control the heating and cooling cycles for polymerisation, parallel with the movement of this mould, the need of such an apparatus and expensive components belonging to this apparatus; affects the costs besides the expensive moulds in a negative way.
  • a system that can be programmed and such a program can control the heating and cooling cycles for polymerisation, parallel with the movement of this mould, the need of such an apparatus and expensive components belonging to this apparatus; affects the costs besides the expensive moulds in a negative way.
  • silicon mould material is able to absorb the liquid within the acrylic mixture poured to the mould and take it within its content because of its sponge like structure. The condition lead to deformations on the usage surface of the product. Accordingly, in applications where silicon mould material is used; it is needed the surface of the product taken out of mould to be gone through procedures like sanding with abrasives and thin abrasives. The absorption of silicon material during polymerisation, of the liquid within the acrylic mixture; give harm to the material itself, rapids the depreciation and corrosion of it, and shortens the usage life of this material. This expensive material, in a condition where it looses its characteristic and becomes unusable, brings unacceptable loads to the costs; since it can not be used as raw material.
  • the aim of this invention is to present a method which can supply to obtain a cast product having enough surface quality, without using the above mentioned expensive moulds, especially ATH (aluminium trihyrdoxide) filled, acrylic or polymethacrylate based mixture, by polymerisation in the mould process.
  • ATH aluminium trihyrdoxide
  • Figure 1 Cross section of top and down mould parts.
  • Figure 2a - and figure 2b - Cross section of shaping carrier acrylic plate and polyethylene foil by using heat and vacuum.
  • Figure 3 Cross section of the replacement of the acrylic plate with polyethylene foil, over the mould to be casted.
  • FIG. 5 Figure showing the separation of hot product from the mould, together with polyethylene foiled acrylic plate.
  • Figure 6 Figure showing the getting out of polyethylene foiled acrylic plate over the product.
  • Figure 7 Cross section of the replacement of the completed product over the 3D - template
  • silicon mould (5) has been used. Silicon mould (5) gives positive results especially in products which tightening and hardening is much in polymerisation, in accordance with the advantages explained above. Besides, the method which is the subject of the invention; for products which are less affected by the volume reduction which polymerisation leaded (e.g. shower basins) it can be applied to moulds other than silicon.
  • the foil (3) used in the invention is carried over a thin acrylic plate (4).
  • Polyethylene is used as protecting foil (3) material and acrylic is used as foil carrying plate (4) material.
  • Polyethylene is wholly an inert material. It never sticks over acrylics.
  • Both foil (3) and carrier plate (4) are chose from thermoplastic materials. They have the characteristic of to be shaped is the desired form easily when they are thermoformed together by applying heat and vacuum. Foil (3) and this characteristics of the plate (4); supplies the method, which is the subject of the invention, to reply to a production program having the target of a wide product range with different designs.
  • the thickness of the foil (3) used is approximately 30-70 microns and the thickness of carrier plate (4) is 1-15 mms.
  • PMMA polymethilmethacrylate and various copolymers and derivatives
  • PVC polyvinylcloride
  • polystyrene ABS (acrilomitrile - butadiene - styrene)
  • PTFA polyethylene ethereftalate
  • polyethylene polypropylene etc.
  • some other plastical materials also can be used as polyethylene foil carrier plastic material only if they have thermoplastic characteristic.
  • the female mould of the cast mode or the usage surface of the model in accordance with the polymerisation in mould method can be get by known methods (by gyps or other procedures).
  • This mould that has been obtained is used in giving the shape to acrylic plate (4) is shaped by known methods ( Figure 2a and 2b) as being stuck over the male mould (2) like a hat or a cover and within the same form with the male mould (2) by using heat and vacuum (thermoform process).
  • the sides of the form in a shell shape are cleaned as to suit to the cast mould.
  • the shell shaped form made up of acrylic plate (4) covered with protecting polyethylene foil is stuck strictly over the male part (2) within the mould which casting will be performed ( Figure 3). After the losing of the female mould (1), passed to casting process ( Figure 4).
  • the method which is the subject of the invention has presented advantages both as not serves for an easy and a series production.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Polymerisation Methods In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

La présente invention concerne le moulage, avec polymérisation dans le moule, d'articles faits de mélanges à base d'acrylique ou de polymétacrylates chargés de trihydroxyde d'aluminium, lequel moulage fait intervenir l'utilisation, dans le moule, d'un film de protection en polyéthylène. Pendant le moulage dans le moule de silicium (5), on cherche à éviter que le mélange (8) à base d'acrylique ou de polyméthacrylate chargé de trihydroxyde d'aluminium se colle chimiquement à la partie mâle du moule (2) contre laquelle se forme la surface d'usure du produit (9). En l'occurrence, on dispose un film de protection en polyéthylène (3) sur cette partie mâle du moule (2) de façon que le mélange chargé coulé dans le moule (8) ne puisse pas endommager le moule en silicium (5) pendant la polymérisation. Le film utilisé (3) est appliqué contre une feuille fine acrylique (4). Une fois que le film de polyéthylène (3) est appliqué sur la feuille acrylique (4) de façon à venir en contact avec la matière de coulée, on procède par thermoformage, grâce à la chaleur et une dépression, pour que ces deux éléments, tels un chapeau ou un couvercle, épousent la forme du moule mâle (2).
PCT/TR1998/000012 1997-07-03 1998-07-03 Procede de moulage et de production d'articles d'acryliques ou de polymetacrylates charge de trihydroxyde d'aluminium moules avec protection du moule par un film de polyethylene Ceased WO1999001270A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU79527/98A AU7952798A (en) 1997-07-03 1998-07-03 Method of casting and producing ath filled acrylic or polymethacrylate based molded articles by using protecting polyethylene foil in the mold
TR2000/00083T TR200000083T2 (tr) 1997-07-03 1998-07-03 Kalıpta koruyucu polietilen folyo kullanarak ath dolgulu akrilik veya polimetakrilat esaslı karışımlardan kalıpta polimerizasyon ile döküm formlar üretim yöntemi.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR97/00579A TR199700579A2 (xx) 1997-07-03 1997-07-03 Kalıpta koruyucu polietilen folyo kullanarak ATH dolgulu akrilik veya polimetakrilat esaslı karışımlardan kalıpta polimerizasyon ile döküm formlar üretim yöntemi
TR97/0579 1997-07-03

Publications (1)

Publication Number Publication Date
WO1999001270A1 true WO1999001270A1 (fr) 1999-01-14

Family

ID=21621203

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR1998/000012 Ceased WO1999001270A1 (fr) 1997-07-03 1998-07-03 Procede de moulage et de production d'articles d'acryliques ou de polymetacrylates charge de trihydroxyde d'aluminium moules avec protection du moule par un film de polyethylene

Country Status (3)

Country Link
AU (1) AU7952798A (fr)
TR (2) TR199700579A2 (fr)
WO (1) WO1999001270A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1177880A1 (fr) * 2000-08-03 2002-02-06 Recticel Procédé de moulage réaction-injection pour la fabrication d'une peau de polyuréthane
DE10108253C1 (de) * 2001-02-21 2002-07-11 Bayern Chemie Gmbh Flugchemie Verfahren zur Herstellung von aus fliessfähigem Material bestehenden Gegenständen
EP2801463A1 (fr) * 2013-05-06 2014-11-12 Ulrich Hüther Résine de coulée

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2601018A1 (de) * 1976-01-13 1977-07-21 Buderus Eisenwerk Verfahren zum verhindern des anklebens stark haftender stoffe an der oberflaeche von behaeltern, werkzeugen o.dgl. und vorrichtung sowie mittel zur durchfuehrung des verfahrens
DE2816090A1 (de) * 1977-04-25 1978-10-26 Ici Ltd Formentrennfolien
DE3731088A1 (de) * 1987-09-16 1989-04-06 Fehrer Gummihaar Verfahren zur herstellung von formteilen aus kunststoff

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2601018A1 (de) * 1976-01-13 1977-07-21 Buderus Eisenwerk Verfahren zum verhindern des anklebens stark haftender stoffe an der oberflaeche von behaeltern, werkzeugen o.dgl. und vorrichtung sowie mittel zur durchfuehrung des verfahrens
DE2816090A1 (de) * 1977-04-25 1978-10-26 Ici Ltd Formentrennfolien
DE3731088A1 (de) * 1987-09-16 1989-04-06 Fehrer Gummihaar Verfahren zur herstellung von formteilen aus kunststoff

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1177880A1 (fr) * 2000-08-03 2002-02-06 Recticel Procédé de moulage réaction-injection pour la fabrication d'une peau de polyuréthane
WO2002011974A1 (fr) * 2000-08-03 2002-02-14 Recticel Procede de production d'une partie de couche, notamment procede de moulage par injection et reaction pour la production d'une couche de revetement en polyurethanne
US6998085B2 (en) 2000-08-03 2006-02-14 Recticel Process for the production of a layer part, in particular a reaction injection moulding process for the production of a polyurethane skin layer
DE10108253C1 (de) * 2001-02-21 2002-07-11 Bayern Chemie Gmbh Flugchemie Verfahren zur Herstellung von aus fliessfähigem Material bestehenden Gegenständen
EP2801463A1 (fr) * 2013-05-06 2014-11-12 Ulrich Hüther Résine de coulée

Also Published As

Publication number Publication date
TR199700579A2 (xx) 1999-01-18
AU7952798A (en) 1999-01-25
TR200000083T2 (tr) 2001-07-23

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