EP0032403A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Manufacture of parts from particulate material
Assignee: Witec Cayman Patents Ltd Cayman Islands
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Filing: 1981-01-14
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Granted: —
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Expires: 2001-01-14
Abstract
Abstract The disclosure relates to a method of binder removal from a green body before sintering or the like wherein the green body is initially heated to a temperature above the melting or flow point of the binder to liquify the binder and, at the elevated temperature, a small portion of the green body is brought into intimate contact with a non-supporting porous body of the lower capillarity potential for the liquid binder. The liquid is drawn from all parts of the green body to the region of contact between the porous body and the green body and enters the body of lower capillarity potential preferentially, removing liquid from the green body through the surface of the green body only at said region of contact. The draining is continued with or without further increase in temperature until the green body is opened or becomes permeable.
Inventors
- 👤 Raymond E. Wiech, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 20:33
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/1017; B22F3/1021; B22F3/1025; B22F1/00; B22F1/10; B22F1/108; B22F3/22; B22F3/225; C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/638; B22F2998/00
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
166 words
A method of producing an article from a fired particulate configuration whereby binder material is removed from the particulate configuration prior to firing without swelling the particulate configuration and consequent imparting of sheer or tensile force to the particulate configuration prior to the firing thereof, comprising the steps of: (1) mixing together predetermined amounts of sinterable particulate material and a binder whereby the binder covers substantially all of the surface of the particles of said particulate material, (2) forming said mixture from (1) into a desired configuration; (3) placing a small selected area of said configuration from (2) in intimate contact with an absorbing body capable of absorbing said binder that is wetted by said binder, whereby a minimum of forces is directed into said configuration by said absorbing body, (4) allowing said binder to flow from said configuration into said absorbing body to extract at least a predetermined portion of said binder from said configuration, and (5) sintering said stripped and formed configuration from (4).
Claim 2
Independent Claim
166 words
A method of producing an article from a fired particulate configuration whereby binder material is removed from the particulate configuration prior to firing without swelling the particulate configuration and consequent imparting of sheer or tensile force to the particulate configuration prior to the firing thereof, comprising the steps of: (1) mixing together predetermined amounts of sinterable particulate material and a binder whereby the binder covers substantially all of the surface of the particles of said particulate material, (2) forming said mixture from (1) into a desired configuration; (3) placing a small selected area of said configuration from (2) in intimate contact with an absorbing body capable of absorbing said binder that is wetted by said binder, whereby a minimum of forces is directed into said configuration by said absorbing body, (4) allowing said binder to flow from said configuration into said absorbing body to extract at least a predetermined portion of said binder from said configuration, and (5) sintering said stripped and formed configuration from (4).
Claim 3
Dependent Claim
23 words
A method as set forth in claim 1 wherein said particulate material is taken from the class consisting of metals, ceramics and cermets.
Claim 4
Independent Claim
30 words
A method as set forth in claims 1 or 2 wherein the volume of binder utilized is equal to volume of the interstices between the particles plus a minute volume.
Claim 5
Dependent Claim
16 words
A method as set forth in claim 1 wherein said particles are of substantially spherical shape.
Claim 6
Dependent Claim
16 words
A method as set forth in claim 2, wherein said particles are of substantially spherical shape.
Claim 7
Dependent Claim
16 words
A method as set forth in claim 3, wherein said particles are of substantially spherical shape.
Claim 8
Dependent Claim
32 words
A method as set forth in claim 1 wherein, in step (4), the temperature is initially raised to the point wherein binder flows from said configuration and then gradually increasing the temperature.
Claim 9
Dependent Claim
32 words
A method as set forth in claim 3, wherein, in step (4), the temperature is initially raised to the point wherein binder flows from said configuration and then gradually increasing the temperature.
Claim 10
Dependent Claim
32 words
A method as set forth in claim 4. wherein, in step (4), the temperature is initially raised to the point wherein binder flows from said configuration and then gradually increasing the temperature.
Claim 11
Dependent Claim
33 words
A method as set forth in claim 5, wherein, in step (4), the temperature is initially raised to the point wherein binder flows from said ' configuration and then gradually increasing the temperature.
Claim 12
Dependent Claim
31 words
A method as set forth in claim 6,wherein, in step (4), the temperature is initially raised to the point wherein binder flows from said configuration and then gradually increasing the temperature.
Claim 13
Dependent Claim
38 words
A method as set forth in claim 7 wherein said porous body is non-defomable at sintering temperatures for said particulate material and wherein said temperature is elevated continuously after binder removal to sintering temperature for said particulate material.
Claim 14
Dependent Claim
38 words
A method as set forth in claim 8 wherein said porous body is non-deformable at sintering temperatures for said particulate material and wherein said temperature is elevated continuously after binder removal to sintering temperature for said particulate material.
Claim 15
Dependent Claim
38 words
A method as set forth in claim 9 wherein said porous body is non-deformable at sintering temperatures for said particulate material and wherein said temperature is elevated continuously after binder removal to sintering temperature for said particulate material.
Claim 16
Dependent Claim
38 words
A method as set forth in claim 10 wherein said porous body is non-deformable at sintering temperatures for said particulate material and wherein said temperature is elevated continuously after binder removal to sintering temperature for said particulate material.
Claim 17
Dependent Claim
38 words
A method as set forth in claim 11 wherein said porous body is non-deformable at sintering temperatures for said particulate material and wherein said temperature is elevated continuously after binder removal to sintering temperature for said particulate material.
Claim 18
Dependent Claim
38 words
A method as set forth in claim 12 wherein said porous body is non-deformable at sintering temperatures for said particulate material and wherein said temperature is elevated continuously after binder removal to sintering temperature for said particular material.
Claim 19
Dependent Claim
8 words
The product of the process of claim 1.
Claim 20
Dependent Claim
8 words
The product of the process of claim 2.
Claim 21
Dependent Claim
8 words
The product of the process of claim 4.
Claim 22
Dependent Claim
8 words
The product of the process of claim 5.
Claim 23
Dependent Claim
8 words
The product of the process of claim 6.
Claim 24
Dependent Claim
8 words
The product of the process of claim 7.
Claim 25
Dependent Claim
8 words
The product of the process of claim 12.
Claim 26
Dependent Claim
8 words
The product of the process of claim 13.
Claim 27
Dependent Claim
8 words
The product of the process of claim 18.
Claim 28
Dependent Claim
36 words
A method as set forth in claim 1 wherein said absorbing body is porous and wherein, in step (4) said binder is heated to a temperature above the flow point of said binder within said configuration.
Claim 29
Dependent Claim
36 words
A method as set forth in claim 2 wherein said absorbing body is porous and wherein, in step (4) said binder is heated to a temperature above the flow point of said binder within said configuration.
Claim 30
Dependent Claim
36 words
A method as set forth in claim 3 wherein said absorbing body is porous and wherein, in step (4) said binder is heated to a temperature above the flow point of said binder within said configuration.
Claim 31
Dependent Claim
36 words
A method as set forth in claim 6 wherein said absorbing body is porous and wherein, in step (4) said binder is heated to a temperature above the flow point of said binder within said configuration.
Claim 32
Dependent Claim
36 words
A method as set forth in claim 7 wherein said absorbing body is porous and wherein, in step (4) said binder is heated to a temperature above the flow point of said binder within said configuration.
Claim 33
Dependent Claim
37 words
A method as set forth in claim 12 wherein said absorbing body is porous and wherein, in step (4) said binder is heated to a temperature above the flow point of said binder within said configuration. :
Claim 34
Dependent Claim
36 words
A method as set forth in claim 13 wherein said absorbing body is porous and wherein, in step (4) said binder is heated to a temperature above the flow point of said binder within said configuration.
Claim 35
Dependent Claim
36 words
A method as set forth in claim 18 wherein said absorbing body is porous and wherein, in step (4) said binder is heated to a temperature above the flow point of said binder within said configuration.
Claim 36
Dependent Claim
8 words
The product of the process of claim 28.
Claim 37
Dependent Claim
8 words
The product of the process of claim 29.
Claim 38
Dependent Claim
8 words
The product of the process of claim 30.
Claim 39
Dependent Claim
8 words
The product of the process of claim 31.
Claim 40
Dependent Claim
8 words
The product of the process of claim 33.
Claim 41
Dependent Claim
8 words
The product of the process of claim 34.
Claim 42
Dependent Claim
8 words
The product of the process of claim 35.
References Cited (Backward Citations)
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