• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a surface treatment method of an object, comprising the following steps: • Quenching said object in a solution comprising a concentrated acid or a mixture of concentrated acids, and having a pH of between 0 and 2 to impregnate the surface of said object; • removal of said object from said acid solution; • Heating said object at a temperature between 140 ° C and 180 ° C, until the melting of the surface; and • cooling said object. The process according to the present invention applies in particular, but not exclusively, to objects derived from additive manufacturing techniques.
    公开号:FR3051127A1
    申请号:FR1654150
    申请日:2016-05-10
    公开日:2017-11-17
    发明作者:Clement Moreau；Myrtille Comte
    申请人:Sculpteo SAS；
    IPC主号:
    专利说明:

    SURFACE PROCESSING METHOD FOR OBJECTS Field of the invention
    The present invention relates to the field of surface treatment methods for objects, especially for objects from additive manufacturing, also called "3D printing".
    The present invention relates more particularly to a surface treatment method for objects, for example polyamide, and in particular derived from additive manufacturing techniques.
    State of the art
    Additive manufacturing, also known as 3D printing, makes it possible to create strata objects by stratum without using molds. It is used in particular for the fast production of plastic parts.
    The objects thus produced have a rougher surface than those obtained by plastic injection. In some special cases, when they are shaped, their surface is in contact with grains of plastic powder or air rather than with a smooth mold.
    This rendering is disturbing for certain applications: an object can for example be judged visually or tactilely unattractive because of this effect.
    Several solutions currently exist, in particular abrasive polishing, the application of varnish / resin or chemical or thermo-chemical dissolution of the surface of the object followed by resolidification.
    Currently, the latter method consists in leaving the object in contact with vapors of a solvent or a mixture of solvents and then removing it when rendering is considered acceptable. The most common polymer / solvent duo is ABS (acrylonitrile butadiene styrene) treated with acetone vapors, but other combinations have been proposed.
    One of the polymers used in 3D printing, polyamide, has a good overall chemical resistance making it difficult to dissolve it by vaporized solvent at ambient temperature. It resists for example totally to acetone. A rise in temperature can favor the process but may pose safety problems depending on the nature of the solvents used.
    Presentation of the invention
    The present invention intends to overcome the drawbacks of the prior art by proposing a process based on a quenching in an acid solution and then a rise in temperature to treat objects, for example polyamide, including but not exclusively objects from a process additive manufacturing. To this end, the present invention relates, in its most general sense, to a method of surface treatment of an object, comprising the following steps: • Tempering of said object in a solution comprising a concentrated acid or a mixture of concentrated acids , and having a pH of between 0 and 2, to impregnate the surface of said object; • removal of said object from said acid solution; • Heating said object at a temperature between 140 ° C and 180 ° C, until the melting of the surface; and • cooling said object.
    The process according to the present invention has the following technical advantages: This treatment solves the problem of the chemical resistance of the polyamide: by its molecular nature, the latter is sensitive to acids (catalyzed hydrolysis). - The acid-activated surface will have a lower melting temperature than the object's core, thus preserving the shape of the object during processing. - The melting / solidification cycle allows the surface to reorganize, erasing the hollows and bumps under the effect of the surface tension and resulting in a smoothing of the surface. - The chemical agent is in liquid form and is applied to the object at room temperature, which allows a certain ease of implementation and reduces the risks related to safety.
    Preferably, said acid solution has a pH of between 0 and 1.
    Advantageously, said acid is a mineral acid.
    According to one embodiment, said acid is included in the following group: sulfuric acid, nitric acid, phosphoric acid and hydrochloric acid.
    Preferably, the heating of said object is carried out at a temperature between 155 ° C and 170 ° C.
    Advantageously, said method further comprises a step of removing the surplus liquid.
    According to a variant, the elimination of the surplus liquid is carried out by applying a centrifugal force to said object.
    According to another variant, the elimination of the surplus liquid is performed by vibrating said object.
    Preferably, said heating step is carried out using a forced convection heating system.
    This ensures a better homogeneity of the heating.
    Advantageously, said quench solution further comprises additives.
    According to one embodiment, said additives are deposited on the surface of the object during said quenching step.
    This confers additional properties on the surface of the object.
    According to one embodiment, said method is applied to an object resulting from additive manufacturing techniques.
    According to one embodiment, said method is applied to a polyamide object.
    Brief description of the drawings
    The invention will be better understood by means of the description, given below for purely explanatory purposes, of one embodiment of the invention, with reference to the figures in which: FIG. 1 illustrates the various stages of the invention; method according to the present invention.
    DETAILED DESCRIPTION OF THE EMBODIMENTS OF THE INVENTION
    The present invention relates to a surface treatment method of an object, for example polyamide, including but not exclusively from additive manufacturing techniques.
    The method according to the present invention comprises the following steps: • Tempering of the object in a solution comprising a concentrated acid or a mixture of concentrated acids, and having a pH of between 0 and 2, in order to impregnate the surface of said object ; • removal of the object from said acid solution; • Heating the object at a temperature between 140 ° C and 180 ° C, until the melting of the surface; and • Cooling the object.
    Figure 1 illustrates the different steps of the method according to the present invention: quenching, drying, heating and cooling, these various steps relating to the object, which in one embodiment, is derived from additive manufacturing techniques.
    In one embodiment, said method is applied to a polyamide object.
    In one embodiment, the acid solution has a pH of between 0 and 1.
    In one embodiment, the acid is a mineral acid, and in one embodiment the acid is included in the following group: sulfuric acid, nitric acid, phosphoric acid, and hydrochloric acid.
    In one embodiment, the heating of the object is carried out at a temperature between 155 ° C and 170 ° C.
    In one embodiment, the method according to the present invention further comprises a step of removing the surplus liquid. According to one variant, the elimination of the surplus liquid is carried out by applying a centrifugal force to the object, and according to another variant, the elimination of the surplus liquid is carried out by vibrating the object.
    In one embodiment, the heating step is implemented using a forced convection heating system, this ensuring a better homogeneity of the heating.
    In one embodiment, the quench solution further comprises additives, and according to one embodiment, the additives are deposited on the surface of the object during the quenching step, this conferring additional properties on the surface. the surface of the object. The invention is described in the foregoing by way of example. It is understood that the skilled person is able to realize different variants of the invention without departing from the scope of the patent.
    权利要求:
    Claims (13)
    [1" id="c-fr-0001]
    1. A method of surface treatment of an object, characterized in that it comprises the following steps: • Quenching said object in a solution comprising a concentrated acid or a mixture of concentrated acids, and having a pH between 0 and 2, to impregnate the surface of said object; • removal of said object from said acid solution; • Heating said object at a temperature between 140 ° C and 180 ° C, until the melting of the surface; and • cooling said object.
    [2" id="c-fr-0002]
    2. Surface treatment method of an object according to claim 1, characterized in that said acid solution has a pH between 0 and 1.
    [3" id="c-fr-0003]
    3. A method of surface treatment of an object according to claim 1 or 2, characterized in that said acid is a mineral acid.
    [4" id="c-fr-0004]
    4. Surface treatment method of an object according to one of claims 1, 2 or 3, characterized in that said acid is included in the following group: sulfuric acid, nitric acid, phosphoric acid and hydrochloric acid.
    [5" id="c-fr-0005]
    5. Surface treatment method of an object according to one of the preceding claims, characterized in that the heating of said object is carried out at a temperature between 155 ° C and 170 ° C.
    [6" id="c-fr-0006]
    6. Surface treatment method of an object according to one of the preceding claims, characterized in that it further comprises a step of removing the surplus liquid.
    [7" id="c-fr-0007]
    7. Surface treatment method of an object according to claim 6, characterized in that the removal of the surplus liquid is carried out by applying a centrifugal force to said object.
    [8" id="c-fr-0008]
    8. A method of surface treatment of an object according to claim 6, characterized in that the removal of the surplus liquid is performed by vibrating said object.
    [9" id="c-fr-0009]
    9. A method of surface treatment of an object according to one of the preceding claims, characterized in that said heating step is carried out using a forced convection heating system.
    [10" id="c-fr-0010]
    10. Surface treatment method of an object according to one of the preceding claims, characterized in that said quenching solution further comprises additives.
    [11" id="c-fr-0011]
    11. Surface treatment method of an object according to claim 10, characterized in that said additives are deposited on the surface of the object during said quenching step.
    [12" id="c-fr-0012]
    12. Surface treatment method of an object according to one of the preceding claims, characterized in that it is applied to an object from additive manufacturing techniques.
    [13" id="c-fr-0013]
    13. A method of surface treatment of an object according to one of the preceding claims, characterized in that it is applied to a polyamide object.
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    同族专利:
    公开号 | 公开日
    EP3243643B1|2018-12-26|
    FR3051127B1|2018-06-15|
    EP3243643A1|2017-11-15|
    US20170327658A1|2017-11-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR772239A|1933-05-04|1934-10-25|Int Latex Processes Ltd|Surface treatment process for rubber-based objects|
    FR3022250A1|2014-06-17|2015-12-18|Ecoat|3D PRINTING THERMOPLASTIC POLYESTER OBJECT PROCESSING SOLUTION AND METHOD THEREOF|
    US6641664B1|1996-02-29|2003-11-04|Michael A. Giallourakis|Paint pad|
    DE112014002879T5|2013-06-18|2016-04-14|Polymertal Ltd.|Treatment of polymeric surfaces of objects|
    KR101994793B1|2014-09-02|2019-07-01|후지필름 가부시키가이샤|Pattern forming method, method for manufacturing electronic device, resist composition and resist film|
    US9457494B2|2014-09-09|2016-10-04|The Boeing Company|Method and apparatus for microwave and convection composite curing|US11135790B2|2016-11-21|2021-10-05|Carbon, Inc.|Method of making three-dimensional object by delivering reactive component for subsequent cure|
    FR3072603B1|2017-10-24|2019-09-27|Sculpteo|SURFACE TREATMENT METHOD FOR OBJECTS|
    WO2019185756A1|2018-03-27|2019-10-03|Technische Universität München|Method for treatment of elements obtained by an additive manufacturing process|
    WO2019201922A1|2018-04-16|2019-10-24|Technische Universität München|Method for treatment of elements obtained by an additive manufacturing process|
    EP3781389A1|2018-04-16|2021-02-24|Technische Universität München|Method for treatment of elements obtained by an additive manufacturing process|
    EP3587080A1|2018-06-30|2020-01-01|Technische Universität München|Method for treatment of elements obtained by an additive manufacturing process|
    EP3587092A1|2018-06-30|2020-01-01|Technische Universität München|Method for treatment of elements obtained by an additive manufacturing process|
    WO2020099096A1|2018-11-12|2020-05-22|Technische Universität München|Method for treatment of elements obtained by an additive manufacturing process|
    EP3698956A1|2019-02-21|2020-08-26|Evonik Operations GmbH|Method for surface treatment of polymers of three-dimensional objects|
    法律状态:
    2017-05-30| PLFP| Fee payment|Year of fee payment: 2 |
    2017-11-17| PLSC| Search report ready|Effective date: 20171117 |
    2018-05-31| PLFP| Fee payment|Year of fee payment: 3 |
    2019-05-31| PLFP| Fee payment|Year of fee payment: 4 |
    2020-05-29| PLFP| Fee payment|Year of fee payment: 5 |
    2021-05-28| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1654150|2016-05-10|
    FR1654150A|FR3051127B1|2016-05-10|2016-05-10|SURFACE TREATMENT METHOD FOR OBJECTS|FR1654150A| FR3051127B1|2016-05-10|2016-05-10|SURFACE TREATMENT METHOD FOR OBJECTS|
    EP17167607.5A| EP3243643B1|2016-05-10|2017-04-21|Surface treatment method for objects|
    US15/590,149| US20170327658A1|2016-05-10|2017-05-09|Surface treatment process for objects|
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