AT394040B - Process for the treatment of porcelain patterns for producing articles by dipping - Google Patents

Process for the treatment of porcelain patterns for producing articles by dipping Download PDF

Info

Publication number
AT394040B
AT394040B AT266888A AT266888A AT394040B AT 394040 B AT394040 B AT 394040B AT 266888 A AT266888 A AT 266888A AT 266888 A AT266888 A AT 266888A AT 394040 B AT394040 B AT 394040B
Authority
AT
Austria
Prior art keywords
porcelain
mold
molds
eroded
diving
Prior art date
Application number
AT266888A
Other languages
German (de)
Other versions
ATA266888A (en
Inventor
Hansgeorg Ing Gruss
Original Assignee
Semperit Ag
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 Semperit Ag filed Critical Semperit Ag
Priority to AT266888A priority Critical patent/AT394040B/en
Publication of ATA266888A publication Critical patent/ATA266888A/en
Application granted granted Critical
Publication of AT394040B publication Critical patent/AT394040B/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/56Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/60Releasing, lubricating or separating agents
    • B29C33/62Releasing, lubricating or separating agents based on polymers or oligomers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00Moulds or cores; Details thereof or accessories therefor
    • B29C33/70Maintenance
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/48Macromolecular compounds
    • C04B41/488Other macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2203/00Other substrates
    • B05D2203/30Other inorganic substrates, e.g. ceramics, silicon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02Shaping 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
    • B29C41/14Dipping a core
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00939Uses not provided for elsewhere in C04B2111/00 for the fabrication of moulds or cores

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention relates to a process for the treatment of porcelain patterns for producing articles by dipping, according to which new porcelain patterns having a rough surface or old, eroded porcelain patterns after prior pyrolytic cleaning are coated with a layer of synthetic polymer.

Claims (4)

AT 394 040 B Die Erfindung betrifft ein Verfahren zur Behandlung von Porzellanformen zur Herstellung von Tauchartikeln. Der Großteil der Formen für die Tauchartikel (z. B. für Latex, PVC, usw.), wird aus Porzellan gefertigt. Die Oberfläche der neuen Porzellanformen muß den Anforderungen bei der Fertigung diverser Tauchartikel angepaßt sein. Diese kann für einige Tauchartikel zu rauh bzw. grobkörnig sein. Weiters werden die Tauchformen bei der Tauchartikelherstellung durch die erhöhten Temperaturen und verschiedenen Tauchbäder im Laufe der Zeit erodiert und müssen ausgetauscht werden. Die Lebensdauer der Porzellanformen, z. B. für die Herstellung von medizinischen Handschuhen, ist etwa 2 Jahre (bei 3 Schichtbetrieb). Die Formen sind danach für das Tauchverfahren nicht mehr einsetzbar und müssen entsorgt werden. Die Erfindung hat sich nun die Aufgabe gestellt die Oberfläche der Porzellan-Tauchformen dem jeweiligen Tauchverfahren anzupassen, bzw. zu erneuern. Gelöst wird die gestellte Aufgabe erfindungsgemäß dadurch, daß neue Porzellanformen, oder erodierte alte Porzellanformen, nach pyrolytischer Reinigung, mit einer geeigneten Kunststoffschicht überzogen werden. Die Porzellanform wird auf 300 bis 500 °C temperiert und in ein Wirbelbett das aus einem Kunststoff in Pulverform besteht, eingetaucht. Weiters ist nach diesem Verfahren auch eine Aufsprühung oder elektrostatische Aufbringung des pulverförmigen Kunststoffes auf die temperierte Porzellanform möglich. Eine weitere Möglichkeit die neuen (rauhen) Prozellanformen zu adaptieren, bzw. die erodierten Formen zu erneuern ist diese, mit einem flüssigen Kunststoff, z. B. Epoxidharz, zu beschichten. Die Beschichtung kann durch Tauchen oder Aufsprühen auf die Form aufgetragen werden. Beispiel 1: Die erodierte Porzellanform wird bei 500 bis 900 °C pyrolytisch von organischen Verunreinigungen befreit. Die heiße Form wird aus dem Pyrolyseofen entnommen und bei Formtemperatur von 300 bis 500 °C z. B. mit einer elektrostatischen Pulverbeschichtungsanlage mit Nylon 13 (Polyamid) beschichtet. Das Nylon 13 (Polyamid) schmilzt und bildet auf der Formoberfläche einen homogenen Kunststoffüberzug. Beispiel 2: Die erodierte Porzellanform wird wie im Beispiel 1 pyrolytisch behandelt. Nachher wird diese bei Temperatur von 300 bis 500 °C in ein Wirbelbett mit Nylon 11 (Polyamid) eingetaucht. Auf der Formoberfläche schmilzt das Nylon 11 und bildet einen homogenen sehr glatten Film. Die Form wird nach dem Auskühlen für jeweilige Tauchprozesse eingesetzt Beispiel 3: Eine erodierte Porzellanform die vorher pyrolytisch gereinigt wurde wird in ein flüssiges Epoxidharz getaucht. Hiebei kann z. B. ein Epoxidharz der Fa. Ciba (Bezeichnung GY250 und Härter HY830) verwendet werden. Das Epoxidharz mit dem die Porzellanform beschichtet ist, wird dann anschließend bei 100 °C/10 min aus-gehärtet Das Epoxidharz bildet auf der Formoberfläche einen homogenen Überzug. Beispiel 4: Auf eine neue rauhe Porzellanform wird eine Kunststoffschicht auf Polyurethanbasis mit einer Spritzpistole aufgesprüht. Als Polyurethan kann z. B. ein Infracol-System (z. B. D 1006 der Fa. Stoll) verwendet werden. Nach dem Aufsprühen des Polyurethans auf die Porzellanform wird anschließend in einem Infrarotofen das Polyurethan ausgehärtet. Dieser Überzug eignet sich für besonders hohe Tauchtemperaturen. Dieses Verfahren ist nicht nur auf die Kunststoffe beschränkt die in den Beispielen 1 bis 4 aufgezählt sind. Es wurden auch erfolgreiche Versuche mit anderen Kunststoffen, wie Polyäthylen, PVC, Polyester, Vinylesterbasis, Polyvinilidenfluorid, usw. durchgeführt. Infolge der glatten Kunststoffoberfläche bleiben die Tauchpartikeln auf der Form weniger haften. Spuren von Tauchpartikeln lassen sich von der Form mit herkömmlichen Waschmitteln beseitigen. PATENTANSPRÜCHE 1. Verfahren zur Behandlung von Porzellanformen zur Herstellung von Tauchartikeln, dadurch gekennzeichnet, daß neue Porzellanformen oder alte erodierte Porzellanformen nach pyrolytischer Reinigung mit einer Kunststoffschicht überzogen werden. -2- AT 394 (MOBAT 394 040 B The invention relates to a method for treating porcelain molds for the manufacture of diving articles. The majority of the molds for the diving articles (e.g. for latex, PVC, etc.) are made of porcelain. The surface of the new porcelain molds must be adapted to the requirements in the manufacture of various diving articles. This can be too rough or coarse-grained for some diving articles. Furthermore, the diving forms in the manufacture of diving articles are eroded by the increased temperatures and various immersion baths over time and must be replaced. The lifespan of the porcelain molds, e.g. B. for the production of medical gloves, is about 2 years (with 3 shifts). The molds can then no longer be used for the dipping process and must be disposed of. The invention has now set itself the task of adapting or renewing the surface of the porcelain immersion molds to the particular immersion process. The object is achieved according to the invention in that new porcelain molds or eroded old porcelain molds are covered with a suitable plastic layer after pyrolytic cleaning. The porcelain mold is heated to 300 to 500 ° C and immersed in a fluidized bed made of a powdered plastic. Furthermore, spraying or electrostatic application of the powdered plastic onto the tempered porcelain mold is also possible using this method. Another possibility to adapt the new (rough) process molds or to replace the eroded molds is to use a liquid plastic, e.g. B. epoxy to coat. The coating can be applied to the mold by dipping or spraying. Example 1: The eroded porcelain mold is freed from organic impurities pyrolytically at 500 to 900 ° C. The hot mold is removed from the pyrolysis furnace and z at a mold temperature of 300 to 500 ° C. B. coated with an electrostatic powder coating system with nylon 13 (polyamide). The nylon 13 (polyamide) melts and forms a homogeneous plastic coating on the mold surface. Example 2: The eroded porcelain mold is treated pyrolytically as in Example 1. Then it is immersed in a fluidized bed with nylon 11 (polyamide) at a temperature of 300 to 500 ° C. The nylon 11 melts on the mold surface and forms a homogeneous, very smooth film. After cooling, the mold is used for the respective immersion processes. Example 3: An eroded porcelain mold that was previously pyrolytically cleaned is dipped in a liquid epoxy resin. Hiebei can e.g. B. an epoxy resin from Ciba (designation GY250 and hardener HY830) can be used. The epoxy resin with which the porcelain mold is coated is then cured at 100 ° C / 10 min. The epoxy resin forms a homogeneous coating on the mold surface. Example 4: A plastic layer based on polyurethane is sprayed onto a new rough porcelain mold with a spray gun. As polyurethane, for. B. an Infracol system (z. B. D 1006 from Stoll) can be used. After the polyurethane has been sprayed onto the porcelain mold, the polyurethane is then cured in an infrared oven. This coating is suitable for particularly high diving temperatures. This process is not only limited to the plastics listed in Examples 1 to 4. Successful attempts have also been made with other plastics such as polyethylene, PVC, polyester, vinyl ester base, polyvinylidene fluoride, etc. Due to the smooth plastic surface, the immersion particles stick less to the mold. Traces of immersion particles can be removed from the mold with conventional detergents. PATENT CLAIMS 1. Process for the treatment of porcelain molds for the manufacture of diving articles, characterized in that new porcelain molds or old eroded porcelain molds are coated with a plastic layer after pyrolytic cleaning. -2- AT 394 (MOB 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Porzellanform bei einer Temperatur von 300 bis 500 °C in ein Wirbelbett aus thermoplastischem Kunststoffpulver eingetaucht wird.2. The method according to claim 1, characterized in that the porcelain mold is immersed at a temperature of 300 to 500 ° C in a fluidized bed made of thermoplastic powder. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß auf die Porzellanform bei 300 bis 500 °C ein thermoplastischer Kunststoff in Pulverform aufgesprüht oder elektrostatisch aufgebracht wird.3. The method according to claim 1, characterized in that a thermoplastic in powder form is sprayed onto the porcelain mold at 300 to 500 ° C or applied electrostatically. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß auf die Porzellanform eine flüssige Kunststoffschicht, wie Epoxidharz, Polyurethan im Tauchverfahren oder Spritzverfahren aufgetragen und anschließend aus-10 gehärtet wird. -3-4. The method according to claim 1, characterized in that a liquid plastic layer, such as epoxy resin, polyurethane is applied to the porcelain mold in the dipping process or spraying process and then hardened. -3-
AT266888A 1988-10-31 1988-10-31 Process for the treatment of porcelain patterns for producing articles by dipping AT394040B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT266888A AT394040B (en) 1988-10-31 1988-10-31 Process for the treatment of porcelain patterns for producing articles by dipping

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT266888A AT394040B (en) 1988-10-31 1988-10-31 Process for the treatment of porcelain patterns for producing articles by dipping

Publications (2)

Publication Number Publication Date
ATA266888A ATA266888A (en) 1991-07-15
AT394040B true AT394040B (en) 1992-01-27

Family

ID=3538389

Family Applications (1)

Application Number Title Priority Date Filing Date
AT266888A AT394040B (en) 1988-10-31 1988-10-31 Process for the treatment of porcelain patterns for producing articles by dipping

Country Status (1)

Country Link
AT (1) AT394040B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123960A1 (en) * 1980-07-03 1982-02-04 Rockwell International Corp., 15219 Pittsburgh, Pa. "PRESSURE LUBRICATION DEVICE"
DD223205A1 (en) * 1984-03-28 1985-06-05 Ifa Getriebewerke Brandenburg OIL SUPPLY DEVICE, ESPECIALLY FOR VEHICLE GEARBOX
DE3346392A1 (en) * 1983-12-22 1985-07-04 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart DEVICE FOR LUBRICATING A BEARING UNIT

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123960A1 (en) * 1980-07-03 1982-02-04 Rockwell International Corp., 15219 Pittsburgh, Pa. "PRESSURE LUBRICATION DEVICE"
DE3346392A1 (en) * 1983-12-22 1985-07-04 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart DEVICE FOR LUBRICATING A BEARING UNIT
DD223205A1 (en) * 1984-03-28 1985-06-05 Ifa Getriebewerke Brandenburg OIL SUPPLY DEVICE, ESPECIALLY FOR VEHICLE GEARBOX

Also Published As

Publication number Publication date
ATA266888A (en) 1991-07-15

Similar Documents

Publication Publication Date Title
DE3030895A1 (en) METHOD FOR PRODUCING A LINED ELASTOMERIC ARTICLE, IN PARTICULAR FOR CLOTHING PURPOSES
DE2440110C2 (en) Multi-layer release agent for demolding polyurethane objects from a molding tool
DE2628462B2 (en) Rubber glove and process for its manufacture
EP3964300B1 (en) Fluorine-free antiadhesive coating and method for the production of same
DE1479115B1 (en) METHOD AND DEVICE FOR THE PRODUCTION OF PLASTIC MOLDED BODIES
DE4116250C2 (en) Process for the treatment of dipping forms and use of the process
US3689613A (en) Glove making
AT394040B (en) Process for the treatment of porcelain patterns for producing articles by dipping
EP0201901A2 (en) Object coated with synthetic resin and method of manufacturing such
DE1646145A1 (en) Coated articles and processes for their manufacture
DE3017981A1 (en) METHOD FOR PRODUCING A POLYURETHANE MOLDED PART
EP0330048A3 (en) Method of making powder coatings from thermoplastic fluororesins
DE1284584B (en) Process to increase the adhesive strength of plastic coatings on glass objects
DE19963670C2 (en) Process for producing a non-stick coating, non-stick coating and use of a non-stick coating
US2344960A (en) Deposition form and method of making the same
DE4007569A1 (en) MANUFACTURING METHOD FOR MINERAL SEPARATION EQUIPMENT
DE4017499C2 (en)
AT403880B (en) FLEXIBLE RUBBER ITEM
DE2211764A1 (en) Process for mirroring surfaces
KR100283062B1 (en) Manufacturing method of rubber gloves having patterns of different colors
AT403881B (en) METHOD FOR APPLYING A SLIDING LAYER TO FLEXIBLE RUBBER ARTICLES
DE10049757A1 (en) Rotational casting of hollow plastic moldings, involves molding and reacting of polyurethane pre-products and additives
DE2603015A1 (en) Seamless rubber glove resistant to oil and solvents - has inner rubber layer and outer layer of butadiene-acrylonitrile copolymer
ATE155T1 (en) METHOD OF MAKING A WATCH CASE AND WATCH MADE BY THIS METHOD.
DE3018074A1 (en) Coating (non)metallic article with adherent silicone elastomer - by spraying with or immersing in anhydrous soln. of elastomer and hardening at room temp.

Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee