# US 5,700,406 A · Process of and apparatus for making a three-dimensional article

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- Number: US 5,700,406 A
- Document ID: US5700406A
- Status: Granted
- Kind: A
- Application number: 08/639,223
- Filed: 1996-04-26
- Granted: 1997-12-23
- Earliest claimed: 1996-04-26
- Assignees: BPM Technology, Inc.
- Inventors: Herbert E. Menhennett; William Berdell Barlage, III; Michael T. Nowak
- Web page: https://patentgrep.com/patent/US5700406A

## CPC

- B29C 41/36: Feeding the material on to the mould, core or other substrate
- B29C 33/38: characterised by the material or the manufacturing process (B29C33/44 takes precedence)
- B29C 33/3842: {Manufacturing moulds, e.g. shaping the mould surface by machining}
- B29C 64/112: using individual droplets, e.g. from jetting heads
- B33Y 10/00: Processes of additive manufacturing
- B33Y 30/00: Apparatus for additive manufacturing; Details thereof or accessories therefor
- 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 (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING

## Abstract

An apparatus for making a three-dimensional article based upon article defining data may be used to make a mold for the article and molding the article from the mold. Alternately, the apparatus may be used to make articles having filled or solid portions. The apparatus preferably includes a base, a processor for defining a mold skin for producing a mold for the three-dimensional article, and a build material dispenser for dispensing build material responsive to the processor to construct the mold skin extending outwardly from the base and defining at least one cavity. Solidifiable fill material is introduced into the cavity to form solid mold portions. The solid mold portions may be separated from the mold skin, and injection molding, for example, used to mold the three-dimensional article. The base preferably includes a thin plastic layer which is penetrable to permit introduction of the solidifiable fill material into the cavity.

## Claims

### Claim 1

An apparatus for making a three-dimensional article based upon article defining data, said apparatus comprising:
a base;
processor means for defining a mold skin for producing a mold for the three-dimensional article based upon the article defining data;
build material dispensing means for dispensing build material responsive to said processor means to construct the mold skin extending outwardly from said base and defining at least one cavity;
said base comprising penetrable surface defining means for being penetrated to introduce a solidifiable fill material into the at least one cavity;
filling means for penetrating said penetrable surface defining means of said base and introducing solidifiable fill material into the at least one cavity to form solid mold portions;
separating means for separating the solid mold portions from the mold skin; and
molding means for using the solid mold portions to form the three-dimensional article.

### Claim 2 (depends on 1)

An apparatus according to claim 1 wherein said penetrable surface defining means comprises a layer of material having properties for adhering dispensed build material thereto.

### Claim 3 (depends on 1)

An apparatus according to claim 1 wherein said base comprises a generally planar member having a plurality of openings extending therethrough.

### Claim 4 (depends on 3)

An apparatus according to claim 3 wherein said plurality of openings are arranged in a predetermined pattern so that first and second openings are aligned with the at least one cavity to facilitate introduction of solidifiable fill material through the first opening and into the at least one cavity and to facilitate escape of air from the at least one cavity and through the second opening during filling.

### Claim 5 (depends on 3)

An apparatus according to claim 3 wherein said penetrable surface defining means comprises a relatively thin plastic layer on said planar member.

### Claim 6 (depends on 5)

An apparatus according to claim 5 wherein said base further comprises a pressure sensitive adhesive for removably mounting said plastic layer on said planar member.

### Claim 7 (depends on 1)

An apparatus according to claim 1 wherein said filling means further comprises volume determining means for determining a volume of solidifiable fill material to be introduced into the at least one cavity.

### Claim 8 (depends on 1)

An apparatus according to claim 1 wherein said filling means comprises means for penetrating a second area of said penetrable surface defining means for permitting escape of air from the at least one cavity during filling thereof.

### Claim 9 (depends on 1)

An apparatus according to claim 1 wherein said separating means comprises build material dissolving means for dissolving build material defining the mold skin.

### Claim 10 (depends on 1)

An apparatus according to claim 1 wherein said molding means comprises an injection molder.

### Claim 11 (depends on 1)

An apparatus according to claim 1 wherein said build material dispensing means comprises:
a build material jet; and
jet positioning means for advancing said build material jet along a predetermined path of travel relative to said base.

### Claim 12 (depends on 11)

An apparatus according to claim 11 wherein said jet positioning means comprises means for positioning said build material jet in three directions and relatively rotatably positioning said build material jet about two axes thereby defining five degrees of freedom of movement for said build material jet relative to said base.

### Claim 13 (depends on 12)

An apparatus according to claim 12 wherein said jet positioning means for relatively positioning said build material jet with respect to said base comprises:
Z-direction positioning means for positioning said build material jet and said base vertically relative to one another;
X-Y positioning means for positioning said build material jet and said base in an X-Y planar direction relative to one another;
flip angle positioning means for rotatably positioning said build material jet relative to an axis generally parallel to said base; and
phi angle positioning means for rotatably positioning said build material jet relative to an axis generally perpendicular to said base.

### Claim 14

An apparatus for making a three-dimensional article based upon article defining data, said apparatus comprising:
a base;
build material dispensing means for dispensing build material based upon the article defining data to construct wall portions extending outwardly from said base and defining at least one cavity;
said base comprising penetrable surface defining means for being penetrated to introduce fill material into the at least one cavity; and
filling means for introducing solidifiable fill material into the at least one cavity so that solidified fill material defines at least a portion of the three-dimensional article or defines at least one mold portion for facilitating molding of the three-dimensional article.

### Claim 15 (depends on 14)

An apparatus according to claim 14 wherein said penetrable surface defining means comprises a layer of material having properties for adhering dispensed build material thereto.

### Claim 16 (depends on 14)

An apparatus according to claim 14 wherein said base comprises a generally planar member having a plurality of openings extending therethrough.

### Claim 17 (depends on 16)

An apparatus according to claim 16 wherein said plurality of openings are arranged in a predetermined pattern so that first and second openings are aligned with the at least one cavity to facilitate introduction of solidifiable fill material through the first opening and into the at least one cavity and to facilitate escape of air from the at least one cavity and through the second opening during filling.

### Claim 18 (depends on 16)

An apparatus according to claim 16 wherein said penetrable surface defining means comprises a relatively thin plastic layer on said planar member.

### Claim 19 (depends on 18)

An apparatus according to claim 18 wherein said base further comprises a pressure sensitive adhesive for removably mounting said plastic layer on said planar member.

### Claim 20 (depends on 14)

An apparatus according to claim 14 wherein said base comprises transparent material to permit viewing during filling of the at least one cavity.

### Claim 21 (depends on 14)

An apparatus according to claim 14 wherein said filling means comprises means for penetrating a first area of said penetrable surface defining means.

### Claim 22 (depends on 21)

An apparatus according to claim 21 wherein said filling means further comprises volume determining means for determining a volume of solidifiable fill material to be introduced into the at least one cavity.

### Claim 23 (depends on 21)

An apparatus according to claim 21 wherein said filling means comprises means for penetrating a second area of said penetrable surface defining means for permitting escape of air from the at least one cavity during filling thereof.

### Claim 24 (depends on 21)

An apparatus according to claim 21 further comprising separating means for separating a solid portion formed within the at least one cavity from dispensed build material.

### Claim 25 (depends on 24)

An apparatus according to claim 24 wherein said separating means comprises build material dissolving means for dissolving build material.

### Claim 26

An apparatus for making a three-dimensional article based upon article defining data, said apparatus comprising:
a base;
build material dispensing means for dispensing build material based upon the article defining data to construct a mold skin extending outwardly from said base and defining at least one cavity;
filling means for introducing solidifiable fill material into the at least one cavity to form solid mold portions; and
molding means for using the solid mold portions to form the three-dimensional article.

### Claim 27 (depends on 26)

An apparatus according to claim 26 wherein said base comprises:
a generally planar member having a plurality of openings extending therethrough; and
a relatively thin layer on said planar member for being penetrated by said filling means to introduce solidifiable fill material into the at least one cavity.

### Claim 28 (depends on 27)

An apparatus according to claim 27 wherein said plurality of openings are arranged in a predetermined pattern so that first and second openings are aligned with the at least one cavity to facilitate introduction of solidifiable fill material through the first opening and into the at least one cavity and to facilitate escape of air from the at least one cavity and through the second opening during filling.

### Claim 29 (depends on 27)

An apparatus according to claim 27 wherein said base further comprises a pressure sensitive adhesive for removably mounting said plastic layer on said planar member.

### Claim 30 (depends on 26)

An apparatus according to claim 26 wherein said filling means further comprises volume determining means for determining a volume of solidifiable fill material to be introduced into the at least one cavity.

### Claim 31 (depends on 26)

An apparatus according to claim 26 wherein said filling means comprises a first tube for penetrating said base at a first area thereof and introducing fill material therethrough.

### Claim 32 (depends on 26)

An apparatus according to claim 26 wherein said filling means comprises a second tube for penetrating a second area of said base for permitting escape of air from the at least one cavity during filling thereof.

### Claim 33 (depends on 26)

An apparatus according to claim 26 further comprising separating means for separating the solid mold portions from the mold skin.

### Claim 34 (depends on 33)

An apparatus according to claim 33 wherein said separating means comprises build material dissolving means for dissolving build material defining the mold skin.

### Claim 35 (depends on 26)

An apparatus according to claim 26 wherein said molding means comprises an injection molder.

### Claim 36 (depends on 26)

An apparatus according to claim 26 wherein said build material dispensing means comprises:
a build material jet; and
jet positioning means for advancing said build material jet along a predetermined path of travel relative to said base.

### Claim 37 (depends on 36)

An apparatus according to claim 36 wherein said jet positioning means comprises means for positioning said build material jet in three directions and relatively rotatably positioning said build material jet about two axes thereby defining five degrees of freedom of movement for said build material jet relative to said base.

### Claim 38

An apparatus for making a mold comprising:
a base;
build material dispensing means for dispensing build material to construct a mold skin extending outwardly from said base and defining at least one cavity;
filling means for introducing solidifiable fill material into the at least one cavity to form solid mold portions; and
separating means for separating the solid mold portions from the mold skin.

### Claim 39 (depends on 38)

An apparatus according to claim 38 wherein said base comprises:
a generally planar member having a plurality of openings extending therethrough; and
a relatively thin layer on said planar member for being penetrated by said filling means to introduce solidifiable fill material into the at least one cavity.

### Claim 40 (depends on 39)

An apparatus according to claim 39 wherein said plurality of openings are arranged in a predetermined pattern so that first and second openings are aligned with the at least one cavity to facilitate introduction of solidifiable fill material through the first opening and into the at least one cavity and to facilitate escape of air from the at least one cavity and through the second opening during filling.

### Claim 41 (depends on 39)

An apparatus according to claim 39 wherein said base further comprises a pressure sensitive adhesive for removably mounting said relatively thin layer on said planar member.

### Claim 42 (depends on 38)

An apparatus according to claim 38 wherein said filling means further comprises volume determining means for determining a volume of solidifiable fill material to be introduced into the at least one cavity.

### Claim 43 (depends on 38)

An apparatus according to claim 38 wherein said filling means comprises a first tube for penetrating said base at a first area thereof and introducing fill material therethrough.

### Claim 44 (depends on 38)

An apparatus according to claim 38 wherein said filling means comprises a second tube for penetrating a second area of said base for permitting escape of air from the at least one cavity during filling thereof.

### Claim 45 (depends on 38)

An apparatus according to claim 38 wherein said separating means comprises build material dissolving means for dissolving build material defining the mold skin.

### Claim 46 (depends on 38)

An apparatus according to claim 38 wherein said build material dispensing means comprises:
a build material jet; and
jet positioning means for advancing said build material jet along a predetermined path of travel relative to said base.

### Claim 47 (depends on 46)

An apparatus according to claim 46 wherein said jet positioning means comprises means for positioning said build material jet in three directions and relatively rotatably positioning said build material jet about two axes thereby defining five degrees of freedom of movement for said build material jet relative to said base.

### Claim 48

A method for making a three-dimensional article based upon article defining data, the method comprising the steps of:
providing a base having a penetrable surface;
dispensing build material based upon the article defining data to construct wall portions extending outwardly from the base and defining at least one cavity; and
penetrating the penetrable surface of the base and introducing fill material therethrough and into the at least one cavity so that the fill material defines at least a portion of the three-dimensional article or defines at least one mold portion for facilitating molding of the three-dimensional article.

### Claim 49 (depends on 48)

A method according to claim 48 wherein the step of introducing fill material comprises introducing solidifiable fill material.

### Claim 50 (depends on 48)

A method according to claim 48 wherein the dispensing step comprises dispensing build material so as to adhere dispensed build material to the penetrable surface of the base.

### Claim 51 (depends on 48)

A method according to claim 48 wherein the step of providing the base comprises providing a generally planar member having a plurality of openings extending therethrough.

### Claim 52 (depends on 51)

A method according to claim 51 wherein the step of providing the base further comprises removably connecting a relatively thin plastic layer on the planar member.

### Claim 53 (depends on 48)

A method according to claim 48 wherein the step of filling comprises first determining a volume of fill material to be introduced into the at least one cavity.

### Claim 54 (depends on 48)

A method according to claim 48 further comprising the step of penetrating a second area of the penetrable surface of the base for permitting escape of air from the at least one cavity during filling thereof.

### Claim 55 (depends on 49)

A method according to claim 49 further comprising the step of separating solid portions formed within the at least one cavity from dispensed build material.

### Claim 56 (depends on 55)

A method according to claim 55 further comprising the step of molding the three-dimensional article using the solid portions as mold portions.

### Claim 57 (depends on 56)

A method according to claim 56 wherein the step of molding comprises injection molding the three-dimensional article.

### Claim 58 (depends on 56)

A method according to claim 56 wherein the step of molding comprises repeatedly molding the three-dimensional article to form a plurality of such three-dimensional articles.

### Claim 59 (depends on 48)

A method according to claim 48 wherein the step of dispensing build material comprises dispensing build material from a build material jet while positioning the jet in three directions and relatively rotatably positioning the jet about two axes thereby defining five degrees of freedom of movement for the build material jet relative to the base.

### Claim 60

A method for making a three-dimensional article based upon article defining data, the method comprising the steps of:
providing a base;
dispensing build material based upon article defining data to construct a mold skin extending outwardly from the base and defining at least one cavity;
introducing solidifiable fill material into the at least one cavity to form solid mold portions; and
molding the three-dimensional article using the solid mold portions.

### Claim 61 (depends on 60)

A method according to claim 60 further comprising the step of separating the solid mold portions from the mold skin.

### Claim 62 (depends on 60)

A method according to claim 60 further comprising the step of defining the mold skin for producing a mold for the three-dimensional article.

### Claim 63 (depends on 60)

A method according to claim 60 wherein the step of molding comprises injection molding the three-dimensional article.

### Claim 64 (depends on 60)

A method according to claim 60 wherein the step of molding comprises repeatedly molding the three-dimensional article to form a plurality of such three-dimensional articles.

### Claim 65 (depends on 60)

A method according to claim 60 wherein the dispensing step comprises dispensing build material so as to adhere dispensed build material to the penetrable surface of the base.

### Claim 66 (depends on 60)

A method according to claim 60 wherein the step of providing the base comprises providing a generally planar member having a plurality of openings extending therethrough.

### Claim 67 (depends on 66)

A method according to claim 66 wherein the step of providing the base further comprises removably connecting a relatively thin plastic layer on the planar member; and wherein the step of introducing fill material comprises penetrating the plastic layer and introducing fill material therethrough.

### Claim 68 (depends on 60)

A method according to claim 60 wherein the step of filling comprises first determining a volume of fill material to be introduced into the at least one cavity.

### Claim 69 (depends on 60)

A method according to claim 60 further comprising the step of penetrating a second area of the penetrable surface of the base for permitting escape of air from the at least one cavity during filling thereof.

### Claim 70 (depends on 60)

A method according to claim 60 wherein the step of dispensing build material comprises dispensing build material from a build material jet while positioning the jet in three directions and relatively rotatably positioning the jet about two axes thereby defining five degrees of freedom of movement for the build material jet relative to the base.