Method for printing three-dimensional items wtih semi-crystalline build materials
AssigneeStratasys, Inc.
InventorsLuke M. B. Rodgers, Vittorio L. Jaker
Life of this patent
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Abstract
A method for printing a three-dimensional part with an additive manufacturing system includes providing a consumable feedstock material comprising a semi-crystalline polymer containing one or more secondary materials, wherein the consumable feedstock material has a process window in which crystalline kinetics are either accelerated or retarded. The consumable feedstock material is melted in the additive manufacturing system. At least a portion of the three-dimensional part from the melted consumable feedstock material in a build environment maintained within the process window.
Claims20
A method for printing a three-dimensional part with an additive manufacturing system, the method comprising:
- providing a consumable feedstock material comprising a semi-crystalline polymer containing one or more secondary materials wherein compositionally the consumable feedstock material is substantially uniform, wherein the consumable feedstock material has a process window in which crystalline kinetics are retarded utilizing a sufficient amount of the one or more secondary materials to be added to the build material such that an enthalpy of the build material with the secondary material is between about 2 J/g heat of fusion and about 80% of the heat of fusion of the build material that is compositionally about 100% of the semi-crystalline build material, as measured by differential scanning calorimetry (DSC) when cooling from the melting temperature to the hot crystalline temperature at a rate of 10° C./min;
- melting the consumable feedstock material in the additive manufacturing system;
- and
- forming at least a portion of the three-dimensional part from the melted consumable feedstock material in a build environment maintained within the process window.
A method for printing a three-dimensional part with an additive manufacturing system, the method comprising:
- providing a consumable feedstock material comprising one or more semi-crystalline polymers containing one or more secondary materials that are configured to retard crystallization of the one or more semi-crystalline polymers wherein compositionally the consumable feedstock material is substantially uniform, wherein the consumable feedstock material has a process window in which crystalline kinetics are retarded and wherein the consumable feed stock has an enthalpy of the consumable feedstock is between about 2 J/g heat of fusion and about 80% of the heat of fusion of the build material that is compositionally about 100% of the semi-crystalline build material, as measured by differential scanning calorimetry (DSC) when cooling from the melting temperature to the hot crystalline temperature at a rate of 10° C./min;
- melting the consumable feedstock material in the additive manufacturing system;
- and
- forming at least a portion of the three-dimensional part from the melted consumable feedstock material in a build environment maintained within the process window.
A method for printing a three-dimensional part with an additive manufacturing system, the method comprising:
- providing a consumable feedstock material comprising a semi-crystalline polymer containing one or more secondary materials that are configured to accelerate crystallization of the one or more semi-crystalline polymers, wherein compositionally the consumable feedstock material is substantially uniform, wherein the consumable feedstock material has a process window in which crystalline kinetics are accelerated and wherein the consumable feed stock has an enthalpy of the consumable feedstock is at least 5 J/g when cooled at 10° C./min cooling as measured by differential scanning calorimetry (DSC) when cooling from the melting temperature to the hot crystalline temperature at a rate of 10° C./min;
- melting the consumable feedstock material in the additive manufacturing system;
- and
- forming at least a portion of the three-dimensional part from the melted consumable feedstock material in a build environment maintained within the process window.
A method for printing a three-dimensional item with a powder sintering additive manufacturing system, the method comprising:
- providing a consumable feedstock material in a powder form comprising a semi-crystalline polymer containing one or more secondary materials that are configured to retard crystallization of the one or more semi-crystalline polymers, wherein compositionally the consumable feedstock material is substantially uniform, wherein the consumable feedstock material has a process window in which a hot crystallization temperature is suppressed at least 3° C. relative to neat semi-crystalline polymer;
- melting the consumable feedstock material in the powder sintering additive manufacturing system;
- and
- forming at least a portion of the three-dimensional part from the melted consumable feedstock material in a build environment maintained within the process window.
Dependencies are inferred from the claim text.