[go: up one dir, main page]

EP0314757A4 - A process for the production of hard surface control members for faucets - Google Patents

A process for the production of hard surface control members for faucets

Info

Publication number
EP0314757A4
EP0314757A4 EP19880904843 EP88904843A EP0314757A4 EP 0314757 A4 EP0314757 A4 EP 0314757A4 EP 19880904843 EP19880904843 EP 19880904843 EP 88904843 A EP88904843 A EP 88904843A EP 0314757 A4 EP0314757 A4 EP 0314757A4
Authority
EP
European Patent Office
Prior art keywords
aluminum oxide
layer
main body
pores
bath
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.)
Withdrawn
Application number
EP19880904843
Other versions
EP0314757A1 (en
Inventor
Alfons Knapp
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.)
Masco Corp of Indiana
Original Assignee
Masco Corp of Indiana
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 Masco Corp of Indiana filed Critical Masco Corp of Indiana
Publication of EP0314757A1 publication Critical patent/EP0314757A1/en
Publication of EP0314757A4 publication Critical patent/EP0314757A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings

Definitions

  • the present invention relates to the production of hard surfaced control members for faucets.
  • pairs of small plates or disks of hard material have been used as control members in fau ⁇ cets, whether simple faucets or mixer faucets.
  • These pairs of small plates of hard material include a fixed small plate* that allows one or more openings for the flow of liquid, and a movable small plate which moves when it comes into contact with the fixed small plate. This move ⁇ ment is achieved by means of maneuverable actions.
  • the movable small plate has apertures and/or a properly out ⁇ lined perimeter so that shifting it exposes, partially closes, or totally closes one or more of the openings of the fixed small plate thereby controlling the flow of the liquid through the faucet.
  • the small plates have been in the form of masses of hard, so-called ceramic material, including oxides, silicates or carbides of vari ⁇ ous elements, that can be formed into the required config ⁇ urations through sinterization of the corresponding pow ⁇ der, and then subjected to lapping on their work surfaces.
  • These work surfaces can also be subjected to particular treatments.
  • the work surfaces can be covered with material of even greater hardness, through physical deposition or chemical deposition by vapor.
  • the work surfaces, which are porous can be impregnated with a lubricating substance.
  • the small plates which are produced in the above noted ways are not satisfactory in some points of Z view.
  • their production through sinterization from ceramic powder allows a notable per ⁇ centage of waste and puts grave limitations on the forma ⁇ tions which are economically obtainable — practically so limited that only planar small plates of a simple form can be made.
  • the fact that the ceramic material used to form the seal and the resistance to attrition of the work sur ⁇ faces makes up the entire mass of the small plates, makes the small plates, themselves, not very resistant to break ⁇ age and contributes to the fact that not many formations are obtainable.
  • the low resistance to breakage is partic ⁇ ularly felt when the small plates are produced with porous materials, in order to reduce the area of contact between the cooperating small plates, and thereby reducing the friction between them.
  • the fact that the hard surfaced control members for faucets can only be re ⁇ alized in the form of small plates that are planar must be considered an unacceptable limitation.
  • some control members have cylin ⁇ drical, conical or spherical work surfaces, for example, some taps which turn and slide axially, or some hemispher ⁇ ical distribution members, which would be desirable in many cases.
  • the purpose of the present invention is that of cre ⁇ ating a new process, which is technologically and economi ⁇ cally convenient, for the production of hard surfaced con ⁇ trol members for faucets and to create a new kind of seal -member which-.is exempt from the disadvantages of the past known small plates made of hard material. It is also de ⁇ sirable to be able to choose the form of these control members liberally without being tied to a planar configu ⁇ ration.
  • the layer of aluminum oxide is subjected to lapping until it has an adequate finish to function as a seal;
  • the layer of aluminum oxide is impreg ⁇ nated with a substance that is adapted to substantially fill the pores thereof.
  • a con ⁇ trol member for faucets which has a body formed essentially of aluminum or its alloy, and a working sur ⁇ face which is made from a thin layer of aluminum oxide that strongly adheres to the metal body.
  • the surface is worked on until it has a high level of finishing; further, this surface has a porous structure and its pores are oc ⁇ cluded by an impregnating substance.
  • the body of the control member is made of aluminum or its alloy permits the easy and economical manufacture of any desired form with ordinary means of metallurgic and mechanical processing, and assures that the control member has a great mechanical resistance against damage and breakage.
  • the layer of aluminum oxide made through anodic oxidation adheres, as noted, very strongly to the metal body and does not present a problem of separation.
  • the aluminum oxide produced in this way has an increased hardness, which is able to reach that of a corundum, and is particularly adapted to form a hard work surface on the control member.
  • the aluminum oxide produced in this way has an essentially porous structure, with pores extending prevalently in a perpendicular direction to the surface, and it is there ⁇ fore adapted to offer an area of contact that is reduced in the cooperation with another control member.
  • the impregnating substance with which the layer of alumi ⁇ num oxide is impregnated assures an adequate seal of the small plates, despite the presence of a highly porous structure, and prevents the formation of calcareous depos ⁇ its in the pores.
  • any of these processes can be conveniently chosen depend ⁇ ing on the desired configuration of the control member and the extent of the foreseen production in order to assure both the attainment of the best technical results as well as a low cost of production.
  • this surface, on the metallic body produced can be mechanically worked until a proper grade of finish ⁇ ing is achieved.
  • aluminum pure or an alloy of aluminum with copper, silicon, magne ⁇ sium, manganese, titanium or other metals — can be used, the choice being dependent upon the process of production adopted and also by any corrosion resistance requirements.
  • the anodic oxidation of the work surface can be done through electrolytic treatment in an acid or alkaline bath with one of the numerous processes known to achieve such a goal. For example, a bath of sulfuric acid at a concen ⁇ tration of 15%, or a bath of organic acids with added salts of titanium, thorium, zirconium, with an electric current of an intensity to produce a potential difference of between 12 and 22 volts.
  • the common treatment usually is to interrupt the anodic treatment upon obtain ⁇ ing a layer of aluminum oxide which is a few one hun- dredths of a millimeter thick.
  • a layer of aluminum oxide of this limited thickness is utilizable only if the initial work surface of the metallic body is sufficiently precise, smooth and regular so that the lapping process can be lim ⁇ ited to the removal of a very thin layer of the aluminum oxide coating. If instead the initial metallic body is not sufficiently finished, the anodic treatment must be prolonged until a thicker layer of aluminum oxide is formed; for example, until it reaches a few tenths of a millimeter. This allows subsequent processing through lapping, with the removal of a relatively thick layer of aluminum oxide.
  • the technique of anodic oxidation offers the necessary means to regulate the thickness of the alu ⁇ minum oxide produced and to regulate the porosity — whether one wants to regulate the absolute dimensions of these pores or to regulate the percentage of surface occu ⁇ pas by the pores themselves — through a proper selection of the composition of the bath, its temperature, the in ⁇ tensity of the electric current and the duration of the treatment. Therefore, the proper coating that is consid ⁇ ered most desirable for the layer of aluminum oxide can be obtained by regulating the known parameters of treatment so that the best results can be obtained.
  • the operation of lapping does not differ from that which is used on the small plates of ceramic material, when the control members have the form of small plates with planar surfaces.
  • the impregnation with an impregnating substance to fill the pore spaces which naturally exist in the struc ⁇ ture of the aluminum oxide coating can be accomplished by using one of the various processes of impregnation which are well known. These processes immerse the parts that are to be impregnated in a bath of the impregnating sub ⁇ stance — ' ⁇ reduced to a sufficiently fluid state, if neces ⁇ sary, through heating, dissolving or diluting, under a vacuum or under sufficiently elevated pressure — to as ⁇ sure the penetration of the impregnating substance into the pores of the layer of aluminum oxide.
  • the impregnat ⁇ ing substance can also be applied, through chemical reac ⁇ tion or physical deposition, directly into the pores of the layer of aluminum oxide.
  • the impregnating substance oc ⁇ cupies most of the pores, is firmly anchored in the pore and not being able to escape from them with time.
  • the impregnating substance must not be one that causes an increase in the friction coefficient. Nat ⁇ urally, it is not bad if the impregnating substance has some lubricating properties but it is not specifically re ⁇ quired because such properties are not utilized in that this substance must go into the pores and remain there without being able to go between the cooperating surfaces of the control members to reduce the friction coefficient.
  • the impregnating substance must be physically and chemically resistant to contact with water including the hot water that can run from the faucet.
  • the impregnating substance can be chosen from a wide variety of materials.
  • synthetic resins belonging practically to all the known groups, waxes, hydrocarbons, halogenated hydrocarbons, silicons; and also, liquid, semi-liquid or solid substanc ⁇ es; for example, graphite, molybdenum sulfide, amorphous or crystalline silicon.
  • the operation of impregnation can also be done after the anodic oxidation treatment and before the lapping operation, or vice versa.
  • the impregnating substance is solid and is produced directly in the pores through a chemical reaction or a physical deposition, it becomes particularly convenient to proceed first with the operation of impregnation and then with the operation of lapping. In this way, the lapping gives rise to an essentially uninterrupted surface that is, in part, made from aluminum oxide, and in part from the impregnating substance that fills the pores of the aluminum oxide.
  • a control member having all the characteristics of the invention, can cooperate with another control member which also has all the characteristics of the invention, or it can cooperate with another control member of a traditional structure, or one which has only one part of the charac ⁇ teristics of the present invention, like a member having a body of aluminum or its alloy and a work surface that is anodically oxidized and lapped, but not impregnated with an impregnating substance.
  • control members of various form for small plates the application of the invention gives the control members mechanical resistance against breakage, excellent sealing characteristics, great fluency and dura ⁇ bility for long use.
  • the freedom of shaping the control members provides a favorable effect on the planning of the entire faucets.
  • the invention not only concerns the stated process of production, but also the control members, having a charac ⁇ teristic structure, that result from the described process in addition to the faucets that use control members which have all or some of the stated characteristics.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Description

A PROCESS FOR THE PRODUCTION OF HARD
SURFACE CONTROL MEMBERS FOR FAUCETS
Background of the Invention
I. Field of the Invention
The present invention relates to the production of hard surfaced control members for faucets.
II- Description of the Prior Art
For a long time, pairs of small plates or disks of hard material have been used as control members in fau¬ cets, whether simple faucets or mixer faucets. These pairs of small plates of hard material include a fixed small plate* that allows one or more openings for the flow of liquid, and a movable small plate which moves when it comes into contact with the fixed small plate. This move¬ ment is achieved by means of maneuverable actions. The movable small plate has apertures and/or a properly out¬ lined perimeter so that shifting it exposes, partially closes, or totally closes one or more of the openings of the fixed small plate thereby controlling the flow of the liquid through the faucet. Until now, the small plates have been in the form of masses of hard, so-called ceramic material, including oxides, silicates or carbides of vari¬ ous elements, that can be formed into the required config¬ urations through sinterization of the corresponding pow¬ der, and then subjected to lapping on their work surfaces. These work surfaces can also be subjected to particular treatments. For example, the work surfaces can be covered with material of even greater hardness, through physical deposition or chemical deposition by vapor. Further, the work surfaces, which are porous, can be impregnated with a lubricating substance.
However, the small plates which are produced in the above noted ways are not satisfactory in some points of Z view. In particular, their production through sinterization from ceramic powder allows a notable per¬ centage of waste and puts grave limitations on the forma¬ tions which are economically obtainable — practically so limited that only planar small plates of a simple form can be made. The fact that the ceramic material used to form the seal and the resistance to attrition of the work sur¬ faces makes up the entire mass of the small plates, makes the small plates, themselves, not very resistant to break¬ age and contributes to the fact that not many formations are obtainable. The low resistance to breakage is partic¬ ularly felt when the small plates are produced with porous materials, in order to reduce the area of contact between the cooperating small plates, and thereby reducing the friction between them. In particular, the fact that the hard surfaced control members for faucets can only be re¬ alized in the form of small plates that are planar must be considered an unacceptable limitation. Further, from the functional point of view, some control members have cylin¬ drical, conical or spherical work surfaces, for example, some taps which turn and slide axially, or some hemispher¬ ical distribution members, which would be desirable in many cases.
Summary of the Present Invention
The purpose of the present invention is that of cre¬ ating a new process, which is technologically and economi¬ cally convenient, for the production of hard surfaced con¬ trol members for faucets and to create a new kind of seal -member which-.is exempt from the disadvantages of the past known small plates made of hard material. It is also de¬ sirable to be able to choose the form of these control members liberally without being tied to a planar configu¬ ration.
This goal is reached, according to the present inven¬ tion, by means of a process in which: - the body of the control member for faucets is manu¬ factured, essentially in the required form, of aluminum or its alloy;
- the work surface of the manufactured body is then submitted to anodic oxidation under such conditions that an adequately thick layer of aluminum oxide is generated?
- the layer of aluminum oxide is subjected to lapping until it has an adequate finish to function as a seal;
- and finally the layer of aluminum oxide is impreg¬ nated with a substance that is adapted to substantially fill the pores thereof.
It should be noted that the order of the last two op¬ erations can be interchanged.
Detailed Description of a Preferred Embodiment of the Present Invention As a result of the process described herein, a con¬ trol member for faucets is made which has a body formed essentially of aluminum or its alloy, and a working sur¬ face which is made from a thin layer of aluminum oxide that strongly adheres to the metal body. The surface is worked on until it has a high level of finishing; further, this surface has a porous structure and its pores are oc¬ cluded by an impregnating substance.
The fact that the body of the control member is made of aluminum or its alloy permits the easy and economical manufacture of any desired form with ordinary means of metallurgic and mechanical processing, and assures that the control member has a great mechanical resistance against damage and breakage. The layer of aluminum oxide made through anodic oxidation adheres, as noted, very strongly to the metal body and does not present a problem of separation. The aluminum oxide produced in this way has an increased hardness, which is able to reach that of a corundum, and is particularly adapted to form a hard work surface on the control member. Further, the aluminum oxide produced in this way has an essentially porous structure, with pores extending prevalently in a perpendicular direction to the surface, and it is there¬ fore adapted to offer an area of contact that is reduced in the cooperation with another control member. Finally, the impregnating substance with which the layer of alumi¬ num oxide is impregnated assures an adequate seal of the small plates, despite the presence of a highly porous structure, and prevents the formation of calcareous depos¬ its in the pores.
There are diverse metallurgic processes which can be used in order to make the body of the small plates. Some that can be cited are: shearing, pressing, coining that start with a slab to produce members in the form of a small plate, as well as pressure casting, precision cast¬ ing, particularly adapted to manufacture members which have more complex forms. Also, for the attainment of hol¬ low control members like jaws, sheaths or liners, the pro¬ cesses of boring, broaching and calibrating through plas¬ tic deformation can be used. In the application of the present invention, these diverse processes are facilitated by the excellent workability of the aluminum or its alloy. Any of these processes can be conveniently chosen depend¬ ing on the desired configuration of the control member and the extent of the foreseen production in order to assure both the attainment of the best technical results as well as a low cost of production. In the cases in which the chosen formation process does not assure the attainment of a work surface which is sufficiently precise, smooth and regular, before proceeding with the operation of anodic oxidation, this surface, on the metallic body produced, can be mechanically worked until a proper grade of finish¬ ing is achieved.
As material for formation of the body, aluminum — pure or an alloy of aluminum with copper, silicon, magne¬ sium, manganese, titanium or other metals — can be used, the choice being dependent upon the process of production adopted and also by any corrosion resistance requirements. The anodic oxidation of the work surface can be done through electrolytic treatment in an acid or alkaline bath with one of the numerous processes known to achieve such a goal. For example, a bath of sulfuric acid at a concen¬ tration of 15%, or a bath of organic acids with added salts of titanium, thorium, zirconium, with an electric current of an intensity to produce a potential difference of between 12 and 22 volts. Having the goal to obtain a protective layer on the aluminum, the common treatment usually is to interrupt the anodic treatment upon obtain¬ ing a layer of aluminum oxide which is a few one hun- dredths of a millimeter thick. In the foreseen applica¬ tion of the invention, a layer of aluminum oxide of this limited thickness is utilizable only if the initial work surface of the metallic body is sufficiently precise, smooth and regular so that the lapping process can be lim¬ ited to the removal of a very thin layer of the aluminum oxide coating. If instead the initial metallic body is not sufficiently finished, the anodic treatment must be prolonged until a thicker layer of aluminum oxide is formed; for example, until it reaches a few tenths of a millimeter. This allows subsequent processing through lapping, with the removal of a relatively thick layer of aluminum oxide.
As noted, the technique of anodic oxidation offers the necessary means to regulate the thickness of the alu¬ minum oxide produced and to regulate the porosity — whether one wants to regulate the absolute dimensions of these pores or to regulate the percentage of surface occu¬ pied by the pores themselves — through a proper selection of the composition of the bath, its temperature, the in¬ tensity of the electric current and the duration of the treatment. Therefore, the proper coating that is consid¬ ered most desirable for the layer of aluminum oxide can be obtained by regulating the known parameters of treatment so that the best results can be obtained. The operation of lapping does not differ from that which is used on the small plates of ceramic material, when the control members have the form of small plates with planar surfaces. It takes on an analogous character to the process used on crystal lenses when the work sur¬ faces have cylindrical, conical or spherically convex forms. It is also similar to the process used on hydrau¬ lic cylinders or on internal combustion engines when the work surfaces have a concave form. There are no particu¬ lar problems posed by the processing of aluminum oxide produced through anodic oxidation. However, such process¬ ing could be done according to procedures which are, in temselves, well known techniques. As already mentioned, the operation of lapping can be limited to the removal of a very thin layer of aluminum oxide, in the cases in which the work surface, after the operation of anodic oxidation, is already notably precise, smooth and regular. Such op¬ erations must be done more deeply when there are correc¬ tions that must be made for defects in the parts or in the planarity or when there is an excessive unevenness of the resulting surface from the anodic oxidation.
The impregnation with an impregnating substance to fill the pore spaces which naturally exist in the struc¬ ture of the aluminum oxide coating, can be accomplished by using one of the various processes of impregnation which are well known. These processes immerse the parts that are to be impregnated in a bath of the impregnating sub¬ stance — '■ reduced to a sufficiently fluid state, if neces¬ sary, through heating, dissolving or diluting, under a vacuum or under sufficiently elevated pressure — to as¬ sure the penetration of the impregnating substance into the pores of the layer of aluminum oxide. The impregnat¬ ing substance can also be applied, through chemical reac¬ tion or physical deposition, directly into the pores of the layer of aluminum oxide. This way of processing is particularly advantageous when one wants to use a solid substance as the impregnating material. Regarding the choice of the impregnating substance, it must be said that an extensive choice exists because it is not required that this substance have a particular characteristic. Its function of occupying the pores of the layer of aluminum oxide is essential, on one hand, to assure the hydraulic seal of the control member which could be compromised by porosity that is too extensive, and above all to prevent calcareous deposits on the inside of the pores as a result of the water that is running through the faucet. In fact, it must be considered that the progressive increase of the friction coefficient by the control members in faucets principally depends on the formation, in their pores, of calcar deposits that, in time, will cause an unevenness of the work surface. Above all, to efficiently prevent the formation of deposits like these, it .is necessary that the impregnating substance oc¬ cupies most of the pores, is firmly anchored in the pore and not being able to escape from them with time. On the other hand, the impregnating substance must not be one that causes an increase in the friction coefficient. Nat¬ urally, it is not bad if the impregnating substance has some lubricating properties but it is not specifically re¬ quired because such properties are not utilized in that this substance must go into the pores and remain there without being able to go between the cooperating surfaces of the control members to reduce the friction coefficient. Finally, the impregnating substance must be physically and chemically resistant to contact with water including the hot water that can run from the faucet. Having in mind that the foregoing requirements must be met, it can be un¬ derstood that the impregnating substance can be chosen from a wide variety of materials. Thus, one can choose synthetic resins belonging practically to all the known groups, waxes, hydrocarbons, halogenated hydrocarbons, silicons; and also, liquid, semi-liquid or solid substanc¬ es; for example, graphite, molybdenum sulfide, amorphous or crystalline silicon. In the cases in which the presence of the impregnat¬ ing substance acts favorably or at least does not disturb the operation of lapping; or in the cases in which this last operation is conducted in such a way that the lapping operation is not disturbed by the presence of the impreg¬ nating substance, the operation of impregnation can also be done after the anodic oxidation treatment and before the lapping operation, or vice versa. In the case in which the impregnating substance is solid and is produced directly in the pores through a chemical reaction or a physical deposition, it becomes particularly convenient to proceed first with the operation of impregnation and then with the operation of lapping. In this way, the lapping gives rise to an essentially uninterrupted surface that is, in part, made from aluminum oxide, and in part from the impregnating substance that fills the pores of the aluminum oxide.
As a result of the application of the concepts of the present invention, the advantages of the use of hard sur¬ faced control members can be extended. Besides being used in faucets as control members of the small plates, they can also be used in faucets as other types of control mem¬ bers. For example, they can be used as control members of taps which turn or slide or have the ability to make both such movements, cooperating with sheaths, liners or jaws. Further, they can be used as distribution members in the form of spherical caps cooperating with a spherically con¬ cave site. In every case the process can be applied, de¬ pending on the circumstances, to both of the cooperating control members, or to only one of them. In other words, a control member, having all the characteristics of the invention, can cooperate with another control member which also has all the characteristics of the invention, or it can cooperate with another control member of a traditional structure, or one which has only one part of the charac¬ teristics of the present invention, like a member having a body of aluminum or its alloy and a work surface that is anodically oxidized and lapped, but not impregnated with an impregnating substance.
In the case of control members of various form for small plates, the application of the invention gives the control members mechanical resistance against breakage, excellent sealing characteristics, great fluency and dura¬ bility for long use. The freedom of shaping the control members provides a favorable effect on the planning of the entire faucets.
The invention not only concerns the stated process of production, but also the control members, having a charac¬ teristic structure, that result from the described process in addition to the faucets that use control members which have all or some of the stated characteristics.
The foregoing detailed description has been given for clearness of understanding only and no unnecessary limita¬ tions should be understood therefrom as some modifications will be obvious to those skilled in the art without de¬ parting from the appended claims.
I claim:

Claims

1. A process for the manufacture of hard surfaced fluid control members for faucets comprising the steps of: forming the main body of said control member for fau¬ cets of an aluminum-based metal; coating said main body through anodic oxidation with a layer of aluminum oxide; lapping said layer of aluminum oxide to form a fin¬ ished surface adapted to function as a seal; and impregnating the pores of said aluminum oxide layer with a filler material.
2. The process as defined in claim 1 wherein said main body is formed by a metallurgical process selected from the group consisting of shearing, pressing, coining, casting, boring, broaching and calibrating through plastic deformation.
3. The process as defined in claim 1 wherein said coating through anodic oxidation is conducted through electrolytic treatment in a bath having a determined acid¬ ity while regulating the composition of the bath, the tem¬ perature of the bath, the electric current passing through the bath and the duration of the electrolytic treatment to form said layer of aluminum oxide.
4. The process as defined in claim 3 wherein said lapping operation removes a portion of said layer of alu¬ minum oxide in accordance with the level of precision, planarity and roughness of said aluminum oxide layer re¬ sulting from the anodic oxidation. 5. The process as defined in claim 4 wherein said impregnation operation is conducted through immersing said control member in an impregnating fluid.
6. The process as defined in claim 4 wherein said impregnation operation is conducted through physical depo¬ sition of an impregnating substance directly into the pores of said aluminum oxide layer.
7. The process as defined in claim 4 wherein said impregnation operation is conducted through chemical depo¬ sition of an impregnating substance directly into the pores of said aluminum oxide layer.
8. The process as defined in claim 1 wherein said main body is lapped to form a finished surface prior to coating said main body through anodic oxidation.
9. A process for the manufacture of hard surfaced fluid control members for faucets comprising the steps of: forming the main body of said control member for fau¬ cets of an aluminum-based metal; coating said main body through anodic oxidation with a layer of aluminum oxide; impregnating the pores of said aluminum oxide layer with a filler material; and lapping said layer of aluminum oxide to form a fin¬ ished surface adapted to function as a seal.
10. The process as defined in claim 9 wherein said main body is formed by a metallurgical process selected from the group consisting of shearing, pressing, coining, casting, boring, broaching and calibrating through plastic deformation.
11. The process as defined in claim 9 wherein said coating through anodic oxidation is conducted through electrolytic treatment in a bath having a determined acid¬ ity while regulating the composition of the bath, the tem¬ perature of the bath, the electric current passing through the bath and the duration of the electrolytic treatment to form said layer of aluminum oxide.
12. The process as defined in claim 11 wherein said lapping operation removes a portion of said layer of alu¬ minum oxide in accordance with the level of precision, planarity and roughness of said aluminum oxide layer re¬ sulting from the anodic oxidation.
13. The process as defined in claim 12 wherein said impregnation operation is conducted through immersing said control member in an impregnating fluid.
.14. The process as defined in claim 12 wherein said impregnation generation is conducted through physical dep¬ osition of an impregnating substance directly into the pores of said aluminum oxide layer.
15. The process as defined in claim 12 wherein said impregnation operation is conducted through chemical depo¬ sition of an impregnating substance directly into the pores of said aluminum oxide layer.
16. A control member for use in faucets to control the flow of fluid in the faucet, said control member com¬ prising: a main body formed of an aluminum-based metal; a coating layer of aluminum oxide applied to said main body, said aluminum oxide layer having a smooth fin¬ ish and a plurality of pores; and an impregnating substance impregnated within said pores of said aluminum oxide layer. 17. The control member as defined in claim 16 where¬ in said aluminum oxide layer is applied to said main body through anodic oxidation.
18. The control member as defined in claim 17 where¬ in said impregnating substance is selected from the group consisting of a synthetic resin, graphite, molybdenum sulfide and silicon.
EP19880904843 1987-05-12 1988-05-06 A process for the production of hard surface control members for faucets Withdrawn EP0314757A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6740787 1987-05-12
IT8767407A IT1210727B (en) 1987-05-12 1987-05-12 PROCEDURE FOR THE PRODUCTION OF HARD SURFACE CONTROL BODIES FOR TAPS AND PRODUCTS THAT RESULT

Publications (2)

Publication Number Publication Date
EP0314757A1 EP0314757A1 (en) 1989-05-10
EP0314757A4 true EP0314757A4 (en) 1990-09-19

Family

ID=11302134

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880904843 Withdrawn EP0314757A4 (en) 1987-05-12 1988-05-06 A process for the production of hard surface control members for faucets

Country Status (9)

Country Link
EP (1) EP0314757A4 (en)
JP (1) JPH01503769A (en)
DE (1) DE3890357C2 (en)
DK (1) DK167478B1 (en)
ES (1) ES2010542A6 (en)
FI (1) FI96827C (en)
GB (1) GB2211444B (en)
IT (1) IT1210727B (en)
WO (1) WO1988008762A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19628577A1 (en) * 1996-07-16 1998-01-22 Grohe Kg Hans Bathroom or sanitary ware water valve washer
DE19811655A1 (en) * 1998-03-18 1999-09-23 Schaeffler Waelzlager Ohg Aluminum-coated plastic component useful as a sliding seal especially in a vehicle hydraulic clutch disengaging system
DE19813641B4 (en) * 1998-03-27 2009-02-26 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Hydraulically actuated disengaging device
US10392718B2 (en) * 2009-09-04 2019-08-27 Apple Inc. Anodization and polish surface treatment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2760925A (en) * 1952-03-14 1956-08-28 Grove Valve & Regulator Co Method for surfacing aluminum
EP0215132A1 (en) * 1985-03-12 1987-03-25 Kvk Co., Ltd. Valve having valve body of ceramic compound
DE3607796A1 (en) * 1986-03-08 1987-09-10 Winfried Heinzel Process for producing sealing rings (washers) for sanitary fittings and a sealing ring

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2211553C3 (en) * 1972-03-10 1978-04-20 Henkel Kgaa, 4000 Duesseldorf Process for compacting anodic oxide layers on aluminum and aluminum alloys
DE2812116C2 (en) * 1977-03-30 1982-06-03 Yoshida Kogyo K.K., Tokyo Method of applying a curable coating to a sealed anodic oxide layer on aluminum
JPS56123398A (en) * 1980-02-29 1981-09-28 Toshiba Corp Surface treatment of metal
JPS5719197A (en) * 1980-07-09 1982-02-01 Shokuhin Sangyo Center Juicing machine
US4513769A (en) * 1982-06-28 1985-04-30 Masco Corporation Of Indiana Method of manufacturing faucets and spouts, faucet inserts, and faucets and spouts manufactured by the method
US4464232A (en) * 1982-11-25 1984-08-07 Sumitomo Metal Industries, Lt. Production of one-side electroplated steel sheet
US4568573A (en) * 1985-02-19 1986-02-04 Nikken Toso Tokyo Company, Limited Process of forming a film of fluorine-containing resin on a metallic substrate
DE3545547A1 (en) * 1985-12-21 1987-07-02 B & S Metalpraecis Gmbh Ball cock as a shut-off and regulating fitting for flows of gaseous and liquid substances, particularly those containing abrasive solids

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2760925A (en) * 1952-03-14 1956-08-28 Grove Valve & Regulator Co Method for surfacing aluminum
EP0215132A1 (en) * 1985-03-12 1987-03-25 Kvk Co., Ltd. Valve having valve body of ceramic compound
DE3607796A1 (en) * 1986-03-08 1987-09-10 Winfried Heinzel Process for producing sealing rings (washers) for sanitary fittings and a sealing ring

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO8808762A1 *

Also Published As

Publication number Publication date
ES2010542A6 (en) 1989-11-16
GB2211444B (en) 1991-05-08
DK729288D0 (en) 1988-12-29
EP0314757A1 (en) 1989-05-10
FI890128A0 (en) 1989-01-11
IT1210727B (en) 1989-09-20
IT8767407A0 (en) 1987-05-12
WO1988008762A1 (en) 1988-11-17
DK729288A (en) 1988-12-29
DK167478B1 (en) 1993-11-08
FI96827C (en) 1996-09-10
DE3890357C2 (en) 1992-04-02
GB2211444A (en) 1989-07-05
GB8829103D0 (en) 1989-03-08
JPH01503769A (en) 1989-12-21
FI890128L (en) 1989-01-11
FI96827B (en) 1996-05-31

Similar Documents

Publication Publication Date Title
DE3401433C2 (en) Process for coating parts of combustion chambers in engines and its application
EP1231299B1 (en) Light alloy-based composite protective multifunction coating
DE102012208333B4 (en) METHOD FOR CONNECTING A METAL WITH A SUBSTRATE
US4221639A (en) Aluminium alloy cylinder and manufacturing method thereof
EP0314757A4 (en) A process for the production of hard surface control members for faucets
DE102016106931A1 (en) A method of forming a heat-shielding film and heat-shielding film structure
WO1995027819A1 (en) Electric iron
US4669529A (en) Continuous casting mould
EP2393965B1 (en) Die for continuous casting
DE69130038T2 (en) Process for the production of castings from aluminum alloys containing an insert and a cylinder head for an internal combustion engine produced according to this process
BRPI0506445B1 (en) Method for fabricating a structured hard chrome layer, method for fabricating a coating, structured hard chrome layer, and coating.
DE2439870A1 (en) COMPOSITION ROTOR HOUSING WITH WEAT-RESISTANT COATING
JPS63303714A (en) Aluminum mold and injection molding
CZ20021368A3 (en) Engraved cylinder and method for manufacturing thereof
WO2003006811A1 (en) Insert, acting as the base area of a cylinder head
JPS609573A (en) Sliding member having monolithic construction and its production
DE2439929C3 (en) A method for achieving an improved bond between an electrodeposited cermet and a cast metal and application of the method
DE19852820A1 (en) Cast aluminum-silicon alloy component has a homogeneous surface deformation zone on the surface to be anodized
JPH0233907B2 (en)
JP2024168105A (en) Piston for internal combustion engine and manufacturing method thereof
JPS5913092A (en) Aluminum alloy cylinder
JPS6056094A (en) Anodic oxidation of aluminum alloy casting
DD221507A1 (en) axial plain
JPH04218694A (en) Method for sealing and hardening anodic oxide film
JPS62278239A (en) Composite material manufacturing method

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19890127

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): FR

A4 Supplementary search report drawn up and despatched

Effective date: 19900731

AK Designated contracting states

Kind code of ref document: A4

Designated state(s): FR

17Q First examination report despatched

Effective date: 19910731

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19911201