CH325201A - Process for producing coatings on the walls of metal fittings, in particular fittings - Google Patents
Process for producing coatings on the walls of metal fittings, in particular fittingsInfo
- Publication number
- CH325201A CH325201A CH325201DA CH325201A CH 325201 A CH325201 A CH 325201A CH 325201D A CH325201D A CH 325201DA CH 325201 A CH325201 A CH 325201A
- Authority
- CH
- Switzerland
- Prior art keywords
- fittings
- walls
- producing coatings
- protective coating
- fitting
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14598—Coating tubular articles
- B29C45/14622—Lining the inner or outer surface of tubular 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
- F16L58/188—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for branching pipes; for joining pipes to walls
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
Verfahren zum Herstellen von Überzügen auf Wandungen von metallenen Formstücken, insbesondere Fittings
Die Mittel zum Oberflächenschutz gegen Rosten müssen nebst dem vollkommenen Rostschutz auch gute physikalische Eigenschaften aufweisen. Haftfestigkeit sowie hinreichende Elastizität sind hier Haupterfordernisse. Die Technik der Herstellung und der Wirtschaft- lichkeit der Verfahren liessen jedoch bis anhin in mancher Hinsieht zu wünschen übrig.
Man hat schonvorgeschlagen, Formstücke für Rohrleitungen gänzlich, das heisst vollwan- clig, aus Kunstharz anzufertigen. Derartige Formstücke sind jedoch nicht allen an sie gestellten Anforderungen in der Praxis gewaeh- sen. Bekannt ist ferner die Auskleidung von Forstücken mit Kunstharz wie auch mit Gummi und dergleichen durch Eingiessen von flüssigem Überzugsmaterial und Schleudern des Formstüekes. Die Haltbarkeit derartig hergestellter Schutzüberzüge befriedigte jedoch in vielen Fällen keineswegs.
Das erfindungsgemässe Verfahren zum Herstellern von Überzügen auf Wandungen von metallenen Formstücken, insbesondere Fittings für Rohrleitungen, zeichnet sich dadurch aus, dass der Schutzüberzug durch Aus spritzen des Hohlraumes zwischen den zu überziehenden Wandungen des Formstückes mld einer Spritzform mit erwärmtem Kunst- stoff hergestellt wird.
Die Zeichnung veranschaulicht vier Ausführungsbeispiele von ausgekleideten Fittings.
Es zeigt:
Fig. 1 einen Fitting-Krümmer mit Schutz überzug innen,
Fig. 2 einen Fitting mit Schutzüberzug innen,
Fig. 3 einen Fitting mit Schutzüberzug aussen und
Fig. 4 einen Fitting mit Schutzüberzug innen und aussen.
Das beispielsweise aus Temperguss hergestellte Formstück oder Fitting 1 von Fig. 1 und 2 wird mit einem vergrösserten Hohlraum 2 hergestellt, entsprechend der Wandstärke des an die Wandung der Innen- und Stirnflächen aufzut.ragenden Schutzüberzuges 3.
Nach Einlegen des Fittings in eine Spritzform werden zweckmässig aus Stahl bestehende Kerne als weitere Teile der Spritzform in den Hohlraum 2 eingeschoben. Nach Schliessen derselben wird mittels einer Spritzgussmaschine, in welcher Kunststoff, beispielsweise Hart Polyvinylchlorid oder verspritzbarer Thermoplast, erwärmt wird, ein Schuss des genannten Kunststoffes in den Hohlraum zwischen den zu überziehenden Wandungen des Fittings und der Spritzform gespritzt, so dass sowohl an der Innenwandung als auch auf den Stirnflächen ein Schutzüberzug 3 aufgetragen wird.
Sowohl der Kern als auch die Spritzform sowie die Spritzgussmaschine sind in der Zeichnung nicht ersichtlich.
In analoger Weise werden Formstücke, wie in Fig. 3 und 4 dargestellt, mit einem Schutzüberzug 5 aussen bzw. aussen und innen, versehen. Der ans Metall bstehende Körper 4 wird in eine Spritzform eingelegt. In den Zwi schenraum zwischen dem Körper 4 und der Spritzform wird erwärmter Kunststoff, beispielsweise verspritzbarer Thermoplast, eingepresst. Fig. 3 zeigt, dass auf diese Weise ein Schutzüberzug aussen und an den Ansehluss- flächen eines Rohrformstüekes hergestellt werden kann.
Derartig hergestellte Schutzüberzüge weisen nicht nur einen vorzüglichen Rostschutz, sondern auch eine gnte Haftbarkeit sowie eine hinreichende Elastizität auf.
Process for producing coatings on the walls of metal fittings, in particular fittings
The means for surface protection against rusting must have good physical properties in addition to complete rust protection. Adhesion strength and sufficient elasticity are the main requirements here. However, the technology of manufacture and the economic efficiency of the processes have so far left something to be desired in some respects.
It has already been proposed that fittings for pipelines should be made entirely of synthetic resin, that is, completely walled. Such fittings, however, are not able to cope with all the requirements placed on them in practice. Also known is the lining of forest ridges with synthetic resin as well as with rubber and the like by pouring in liquid coating material and centrifuging the molded piece. In many cases, however, the durability of protective coatings produced in this way was by no means satisfactory.
The method according to the invention for producing coatings on the walls of metal fittings, in particular fittings for pipelines, is characterized in that the protective coating is produced by injecting the cavity between the walls of the fitting to be coated using an injection mold with heated plastic.
The drawing illustrates four embodiments of lined fittings.
It shows:
Fig. 1 shows a fitting bend with protective coating inside,
2 shows a fitting with a protective coating inside,
3 shows a fitting with a protective coating on the outside and
4 shows a fitting with a protective coating inside and outside.
The molded piece or fitting 1 of FIGS. 1 and 2, made for example from malleable cast iron, is made with an enlarged cavity 2, corresponding to the wall thickness of the protective coating 3 to be applied to the wall of the inner and end faces.
After the fitting has been placed in an injection mold, cores made of steel are expediently pushed into the cavity 2 as further parts of the injection mold. After closing the same, an injection molding machine in which plastic, for example hard polyvinyl chloride or injectable thermoplastic, is heated, is injected into the cavity between the walls of the fitting to be coated and the injection mold, so that both on the inner wall and a protective coating 3 is applied to the end faces.
Neither the core nor the injection mold nor the injection molding machine can be seen in the drawing.
In an analogous manner, molded pieces, as shown in FIGS. 3 and 4, are provided with a protective coating 5 outside or outside and inside. The body 4 protruding from the metal is placed in an injection mold. In the inter mediate space between the body 4 and the injection mold, heated plastic, for example injectable thermoplastic, is pressed. 3 shows that in this way a protective coating can be produced on the outside and on the connection surfaces of a pipe fitting.
Protective coatings produced in this way have not only excellent rust protection, but also good adhesion and sufficient elasticity.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH325201T | 1954-12-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH325201A true CH325201A (en) | 1957-10-31 |
Family
ID=4499805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH325201D CH325201A (en) | 1954-12-01 | 1954-12-01 | Process for producing coatings on the walls of metal fittings, in particular fittings |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH325201A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1279326B (en) * | 1964-04-24 | 1968-10-03 | Philips Nv | Injection molding process for producing a ring from sintered, ferromagnetic oxide material and a core in the ring made of thermoplastic or thermosetting plastics and an injection mold for carrying out the process |
DE4339277C2 (en) * | 1993-11-18 | 2001-02-22 | Bosch Gmbh Robert | Method for producing an electromagnetic control element |
DE10062052C1 (en) * | 2000-12-13 | 2002-04-18 | Reichert Gmbh Kunststofftechni | Plant for making hollow, internally-injected plastic-metal composites, includes separate plasticizer and injection unit, with holder for workpiece which can be heated and cooled |
-
1954
- 1954-12-01 CH CH325201D patent/CH325201A/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1279326B (en) * | 1964-04-24 | 1968-10-03 | Philips Nv | Injection molding process for producing a ring from sintered, ferromagnetic oxide material and a core in the ring made of thermoplastic or thermosetting plastics and an injection mold for carrying out the process |
DE4339277C2 (en) * | 1993-11-18 | 2001-02-22 | Bosch Gmbh Robert | Method for producing an electromagnetic control element |
DE10062052C1 (en) * | 2000-12-13 | 2002-04-18 | Reichert Gmbh Kunststofftechni | Plant for making hollow, internally-injected plastic-metal composites, includes separate plasticizer and injection unit, with holder for workpiece which can be heated and cooled |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE112013006361T5 (en) | Plastic pump and method for producing the same | |
DE102015222297A1 (en) | Method for producing a vehicle component | |
DE102017102755A1 (en) | Sealing element with veneer strip | |
CH325201A (en) | Process for producing coatings on the walls of metal fittings, in particular fittings | |
DE102007057121A1 (en) | Method for manufacturing polyurethane-molded articles, involves coating with high surface finish quality and barrier characteristics is applied against fiber-reinforced polyurethane-systems in lower part of pressing tool | |
WO2013083842A1 (en) | Hollow-bodied component and method for the production thereof | |
DE1115446B (en) | Method for cladding the inner and outer walls of metal pipe fittings, e.g. B. Fittings | |
DE102008007879B4 (en) | Carbon fiber composite component | |
DE3824071A1 (en) | METHOD FOR PRODUCING INJECTED MOLDED BODIES FROM COMPOSITES | |
DE2141605A1 (en) | Process for the production of composite bodies from rigid foam plastic and heat-sensitive components | |
DE2623289A1 (en) | Coated or lamina lined, resinous composite hollow material - has fibrous reinforcement partly embedded in both the load bearing wall and the adjacent lamina | |
DE102016220806A1 (en) | Method for producing an outer skin component of a vehicle | |
DE1604434A1 (en) | Injection mold | |
DE102016217666A1 (en) | Method for injection molding a thermoplastic plastic component and thermoplastic plastic component | |
DE102005062825A1 (en) | Plastic coated, injection molded, hollow thermoplastic plastic product manufacture involves application of softer thermoplastic onto outer surface of cooled rigid hollow thermoplastic molding | |
DE3434522A1 (en) | METHOD FOR PRODUCING MOLDED PARTS FROM FIBER REINFORCED RESIN RESIN | |
DE2019447A1 (en) | Gfr plastics tank container | |
DE2230404A1 (en) | METHOD FOR PRODUCING SMOOTH PLASTIC MOLDED PARTS BY INJECTION MOLDING, MOLDING TOOLS SUITABLE FOR PERFORMING THE PROCESS AND MOLDED PART PRODUCED BY THE METHOD | |
DE102017219020A1 (en) | Process for producing a finished component comprising an electronic element | |
DE2017970A1 (en) | Process for the production of heavy-duty foam bodies | |
DE2827574A1 (en) | Glass-fibre-reinforced PVC car body parts - are made by blow-moulding PVC component, placing into prepreg-lined mould, and curing under pressure | |
US20200223157A1 (en) | Method for Producing a Fiber-Reinforced Plastic Outer Skin Component for a Vehicle, and Fiber-Reinforced Plastic Outer Skin Component | |
DE102016113635A1 (en) | Interior ornamental component of a motor vehicle and method for producing the same | |
DE1289295B (en) | Process for the production of moldings, in particular profiles, from fiber-reinforced casting resins | |
DE1007512B (en) | Throttle device made of plastic |