JP3212374U - Moldings - Google Patents

Abstract

To provide a molded product capable of easily changing the shape of the molded product. A molded article using a 3D printer or a 3D pen, the molded article having a predetermined three-dimensional solid shape, mainly composed of a thermoplastic resin, and imparting a temperature of 30 to 60 ° C. By this, at least a part of the modeled object can be softened and deformed freely. The glass transition temperature of the thermoplastic resin is 30 to 60 ° C. As such a thermoplastic resin, a polyester copolymer containing terephthalic acid as an acid component and ethylene glycol and 1,4-butanediol as a diol component is preferable. [Selection] Figure 1

Description

  The present invention relates to a molded article formed by a 3D printer or a 3D pen.

  In recent years, a three-dimensional molding method for obtaining a three-dimensional shaped molding based on data such as 3D CAD and 3DCG (three-dimensional computer graphics) has been rapidly spread. In particular, 3D printers that employ a hot melt lamination method (FDM method) using a thermoplastic resin as a molding material are also sold at low cost and are also popular in the home.

  High-strength, high-rigidity or heat-resistant resins such as ABS resin, polycarbonate resin, or polylactic acid resin are mainly used as the thermoplastic resin used in the hot melt lamination method (Patent Document 1, Claim 11). When the molded product obtained by the three-dimensional molding method does not have the desired shape, it is necessary to change the shape. However, if the thermoplastic resin has high strength or high rigidity, the user can use it at the workplace or home. It was difficult to change the shape in the environment. For example, polylactic acid can be softened and deformed when heated to 60 ° C. or higher. However, since it is high temperature, there is a risk of burns during work, and it cannot be said that it can be handled safely.

Japanese Patent Laying-Open No. 2015-221568

  The subject of this invention is providing the molded article which can change the shape of a molded article easily.

  This invention solves the said subject by employ | adopting a specific thing as a molding material.

  That is, the present invention is a molded article using a 3D printer or a 3D pen, and the molded article has a predetermined three-dimensional shape and is mainly composed of a thermoplastic resin. The gist of the molded article is that at least a part of the molded article is softened and deformable freely by applying a temperature of ° C.

  According to the present invention, when a temperature of 30 to 50 ° C. is applied to a molded article having a three-dimensional solid shape mainly composed of a thermoplastic resin, the shape can be freely deformed and changed. it can. In particular, since the temperature for changing the shape can be set at 30 to 50 ° C., the shape of the molded product can be easily changed at work or at home.

  As a thermoplastic resin used in the present invention, by adding a temperature of 30 to 50 ° C., the thermoplastic resin can be softened and deformed. Therefore, a thermoplastic resin that is softened by applying a temperature of 30 to 50 ° C. is used. As such a thermoplastic resin, those having a glass transition temperature of 50 ° C. or lower, preferably 30 to 50 ° C., can be preferably used. When a shaped article composed of such a thermoplastic resin is heated to a temperature equal to or higher than the glass transition temperature, the shape can be easily changed. For example, when the glass transition temperature is about 30 to 50 ° C., the shape can be easily changed if the glass transition temperature is immersed in bath water or is held by fingers. The thermoplastic resin is not particularly limited, such as polyolefin-based, polyamide-based, polyester-based, polystyrene-based, acrylic-based, diene-based, polyether-based, etc., but from the viewpoint of mechanical properties, chemical resistance, weather resistance, etc. Thermoplastic resins are preferred. More specifically, examples of the polyester-based thermoplastic resin include polyester copolymers containing terephthalic acid as an acid component and ethylene glycol and 1,4-butanediol as a diol component. Moreover, the polyester copolymer which contains a terephthalic acid and (epsilon) -caprolactone as an acid component, and contains ethylene glycol and 1, 4- butanediol as a diol component is mentioned.

  Such a polyester copolymer can be produced by a known polycondensation method, and generally can be produced by adding 50 mol% of an acid component and 50 mol% of a diol component and performing dehydration condensation. What is characteristic in the present invention is that terephthalic acid (with ε-caprolactone if necessary) is used as the acid component, and ethylene glycol and 1,4-butanediol are used as the diol component. Each of these components is used for adjusting the glass transition temperature and the crystallization temperature.

  The 1,4-butanediol used in combination with ethylene glycol as the diol component is preferably 30 to 70 mol% in the diol component. When 1,4-butanediol is less than 30 mol% or exceeds 70 mol%, the glass transition temperature of the polyester copolymer tends to be difficult to decrease. It is preferable that ε-caprolactone used in combination with terephthalic acid as the acid component is 5 to 20 mol% in the acid component. When ε-caprolactone is used as a copolymerization component, the glass transition temperature of the polyester copolymer can be further lowered. When ε-caprolactone exceeds 20 mol%, the polyester copolymer tends to be difficult to crystallize at a predetermined temperature.

  The polyester copolymer has a melting point of 250 ° C. or lower, preferably 200 ° C. or lower, more preferably 130 to 200 ° C. The crystallization temperature is 120 ° C. or lower, preferably 20 ° C. or higher than the glass transition temperature. The crystallization temperature is a temperature at which crystallization of the polyester copolymer is most accelerated. The molded product is not crystallized unless it is heat-treated at the crystallization temperature during molding, and it is in a state with many amorphous regions, so it can easily change its shape when heated above the glass transition temperature. Is possible. When the shape is changed and then heat treatment is performed at the crystallization temperature, crystallization proceeds and a molded product having high strength or high rigidity can be obtained. For example, when the crystallization temperature is about 100 ° C., crystallization proceeds and a molded product with high strength or high rigidity is obtained when immersed in boiling water, and the changed shape can be fixed.

  In the above polyester copolymer, another polymer may be added in order to adjust the ease of softening and strength of the molded product. For example, polyolefin resin, acrylic resin, vinyl acetate resin, polyester resin, polyamide resin, vinyl chloride resin, vinylidene chloride resin, polytetrafluoroethylene resin, silicone resin or polyurethane resin alone Or you may add and mix.

  Moreover, in the thermoplastic resin which comprises a molded article, various additives may contain as needed. For example, a dye or pigment may be added to the filament to obtain a color molding. In particular, in the present invention, it is preferable to add a thermochromic pigment that changes color at the glass transition temperature and the crystallization temperature, because it is possible to determine whether the molded product is deformable or whether the molded product is crystallized. Furthermore, fillers, plasticizers, flame retardants, lubricants, weathering agents, antioxidants, heat resistance agents, and the like can also be added.

  The molded product of the present invention is a molded product obtained by a 3D printer or a 3D pen, but a material for obtaining the molded product (molding material) is constituted by the specific thermoplastic resin described above. The form of the material is not particularly limited, and may be an appropriate form depending on the 3D printer to be used. Various forms such as a so-called linear form, a granular form, a powder form, a sheet form, etc. Things can be used. As a linear form, it is a continuous linear thing about 0.1-5 mm in diameter, It is good to attach this to a 3D printer by winding this several dozens-several hundreds m into a reel form.

  The linear form can be obtained by melting a raw material mainly composed of the thermoplastic resin and extruding it from a spinning nozzle. The granular form may be obtained by cutting the obtained linear form into a desired length (for example, about 1 μm to 5 mm).

  The molded article of the present invention can be obtained, for example, by the following method. The above molding material is supplied to a 3D printer, and the molding material is fed into an extruder. The extruder includes an extrusion nozzle and a heating device that heats the extrusion nozzle, and the molding material is melted in the heating device and discharged from the extrusion nozzle. The extruder moves based on the data, and the discharged melt is laminated to obtain a three-dimensional shaped molding. When laminating the melt, it may be heated or cooled as necessary. When heating, it is preferable that the crystallization of the molded product is not accelerated. Moreover, when cooling, since there is little possibility that a molded article will crystallize, it should just carry out arbitrarily in the range in which sufficient interlayer adhesion is obtained. In addition to the molding material in the present invention, a molding material composed of a conventionally known polylactic acid resin or ABS resin is also attached to the 3D printer to obtain a molding, and only a specific part of the molding is obtained. It is good also as a molding in this invention. Alternatively, one or more shaped objects in this case and one or more conventionally known shaped objects may be prepared, and these may be integrated by a method such as adhesive or heat welding. In this case, in order to improve the adhesion between the part of the molding according to the present invention and the part of the conventionally known molding, various processes such as plasma processing are applied to the part of the molding material or the part of the molding according to the present invention. May be.

  When a temperature of 30 to 50 ° C. is applied to the shaped object of the present invention, the shape can be freely deformed and changed. For example, if the shape of the molded object is a human form, The orientation of fingers, feet, neck, etc. can be changed freely, and the body can be bent. Further, if the shape of the molded article is a flower, the opening of the petals, the angle of the leaves, the bending of the stem, etc. can be freely changed. Moreover, if the shape of the molding is an animal, the direction and angle of the foot, ear, neck, etc. can be freely changed. In addition, if the shape of the molded object is an insect, the orientation and angle of the tactile sensation, feet, etc., and if the shape of the molded object is a fish, the fin angle and the body can be twisted freely. Can be changed. In addition, various forms such as various tools, equipment, tools, tools, parts, toys, polyhedrons, cylinders, cones, spheres, geometric bodies, and combinations of these can be formed and freely deformed. Can be made. Further, if necessary, the molded article can be finished in a desired shape by heat treatment at the crystallization temperature of the thermoplastic resin and processed so as not to be softened and deformed by heating near the glass transition temperature.

Example 1
Polyester copolymer (melting point 180 ° C., glass transition temperature 45 ° C., crystallization temperature 110 ° C., specific gravity 1.38) consisting of 50 mol% terephthalic acid, 25 mol% ethylene glycol and 25 mol% 1,4-butanediol Using the material in the form of a linear form, a molded product in the form of a human hand was created with a 3D printer (Davinci Pro, manufactured by XYZ printing) using an FDM method. The fingers of the hand of the molded person were in an open state as shown in FIG. Since the fingers of the obtained molding were actually gripped and warmed, they could be transformed into a closed state.

Example 2
Polyester copolymer comprising 43 mol% terephthalic acid, 7 mol% ε-caprolactone, 25 mol% ethylene glycol and 25 mol% 1,4-butanediol (melting point 160 ° C., glass transition temperature 30 ° C., crystallization temperature 75 ° C. Using a linear material composed of a specific gravity of 1.38), a molded product in the form of a human hand was obtained in the same manner as in Example 1 with a 3D printer (Davinci Pro) manufactured by XYZ printing. Created. The fingers of the molded person's hands were in an open state. Since it became soft when the fingers of the molding were actually held and warmed, it could be transformed into a closed state.

  The molded object in the form of a hand with the finger closed is dipped in boiling water and then pulled up, and again it is not soft and hard even if it is warmed by grasping the finger, fixing the form with the finger closed. I was able to.

Comparative Example 1
Using a linear form material composed of polylactic acid (melting point: 165 ° C., glass transition temperature: 60 ° C., crystallization temperature: 110 ° C., specific gravity: 1.24) with a 3D printer (Davici Pro) manufactured by XYZ printing In the same manner as in Example 1, a molded product in the form of a human hand was prepared. The fingers of the molded person's hands were in an open state. The fingers of the moldings were actually held and warmed, but they were still hard and it was impossible to change the shape.

1 is a schematic view of a modeled object (a human hand) molded in Example 1. FIG.

Claims (6)

  A molded product using a 3D printer or a 3D pen, wherein the molded product has a predetermined three-dimensional solid shape and is mainly composed of a thermoplastic resin, and imparts a temperature of 30 to 50 ° C. to the molded product. A molded article characterized in that at least a part of the molded article can be softened and deformed freely.   The molded article according to claim 1, wherein the thermoplastic resin has a glass transition temperature of 30 to 50 ° C.   The molded article according to claim 1 or 2, wherein the molded article is obtained by a hot melt lamination type 3D printer.   The thermoplastic resin is a polyester copolymer containing terephthalic acid as an acid component and ethylene glycol and 1,4-butanediol as a diol component. Molded product.   The thermoplastic resin is a polyester copolymer containing terephthalic acid and ε-caprolactone as acid components and ethylene glycol and 1,4-butanediol as diol components. 1. A molded article according to item 1. The shape of the object is a plant, animal, insect, fish, human, human body part, instrument, equipment, tool, tool, part, toy, polyhedron, cylinder, cone, sphere, geometric body, and combinations of these The shaped article according to any one of claims 1 to 5, which has a shape.