JP2019155689A - Joined component and method for producing the same - Google Patents

Abstract

To suppress stress concentration to a reinforcing member reinforcing the joint of a joined component, and to prevent deterioration in the appearance of the joined component while securing the high bending strength of the joined component.SOLUTION: In a planar joined component formed by joining a plurality of resin plates, the mutually adjacent edge faces of the plurality of resin plates are joined with an adhesive, a joint obtained by mutually joining the edge faces of the plurality of resin plates is reinforced by a sheet-shaped or thin plate-shaped reinforcing member so as to cover the joint from at least either side of the surface side or back face side of the resin plate, and the adhesive used for joining the edge faces of the resin plate is a reaction type adhesive whose glass transition temperature after curing is 90°C or higher.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a joined component and a method for manufacturing the same.

  Conventionally, a plate-like joining component formed by joining a plurality of resin plates is known.

  In Patent Document 1, two flat resin plates are butted at their end faces, and a backing plate (reinforcing member) is provided with an adhesive so as to cover the butting portion (joining portion) of the joining member. A structure (joint part) is disclosed. In this structure (joint part), a gap of 12 mm or more and 500 mm or less is provided between the end surfaces of the butted portion (joint part) of the joining member. By providing this gap, it is said that the stress concentration on the contact plate (reinforcing member) that reinforces the butting part (joining part) of the structure can be alleviated and the strength of the butting part (joining part) can be improved.

  However, in the structure (joint part) of Patent Document 1, the structure (joint part) is easily bent at the abutting part (joint part) due to the gap provided between the end faces, and the bending strength of the structure (joint part) is increased. May not be secured. If the base plate (reinforcing member) is thickened to ensure the bending strength of the structure (joint part), the step at the edge of the base plate becomes large and the appearance of the structure (joint part) deteriorates. There is a problem of end.

  In order to solve the above-described problems, the present invention provides a plate-like joining component formed by joining a plurality of resin plates, and the adjacent end surfaces of the plurality of resin plates are joined to each other with an adhesive. The joint portion where the end surfaces of the plurality of resin plates are joined to each other is a sheet-shaped or thin plate-shaped reinforcing member that covers the joint portion from at least one of the front surface side and the back surface side of the resin plate. It is characterized by being reinforced.

  ADVANTAGE OF THE INVENTION According to this invention, while suppressing the stress concentration to the reinforcement member which reinforces the junction part of a joining member, deterioration of the external appearance of a joining member can be prevented, ensuring the bending strength of joining components.

(A) is a side view which shows an example of the joining component (butting reinforcement structure) which concerns on this embodiment. (B) is an exploded perspective view of two resin plates and a plastic film before joining with the adhesive of a joining component. The graph which shows the relationship between the maximum stress obtained by performing a three-point bending test about the joining component of the structure of FIG. 1, and the glass transition temperature after hardening of the reactive adhesive used for adhesion | attachment. (A) is a side view which shows an example of the other joining components (fitting reinforcement structure) which concern on this embodiment. (B) is an exploded perspective view of two resin plates and a plastic film before joining with the adhesive of a joining component. (A) is a side view which shows an example of the further another joining component (reinforcement member embedding structure) which concerns on this embodiment. (B) is an exploded perspective view of two resin plates and a plastic film before joining with the adhesive of a joining component. The block diagram which shows the schematic structural example of the three-dimensional modeling apparatus of a FDM system. Explanatory drawing which shows the detail of the three-dimensional modeling apparatus of a FDM system typically. The block diagram which shows schematic structure of the three-dimensional modeling apparatus of a SLS system Explanatory drawing which shows the detail of the three-dimensional modeling apparatus of a SLS system typically.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, although the following embodiment demonstrates the case where the number of the resin plates of joining object is two, the number of the resin plates of joining object may be three or more.

  Fig.1 (a) is a side view which shows an example of the joining component 10 which concerns on this embodiment. FIG. 1B is an exploded perspective view of the two resin plates 11 and the plastic film 12 before joining with the adhesive of the joining component 10. In FIG. 1, a joining component 10 is a plastic film as a sheet-shaped reinforcing member that joins (adheres) end surfaces 11a of two resin plates 11 with an adhesive and covers the front surface side of the joining portion. 12 is attached with an adhesive. Hereinafter, the structure of the joining component shown in FIG. 1 is also referred to as a “butting reinforcement structure”.

The joining component 10 shown in FIG. 1 can be manufactured by the following manufacturing method, for example.
In an example of the manufacturing method of the joining component 10, first, a fast-curing adhesive is applied in a dot shape to at least one of the plurality of end surfaces 11 a of the two resin plates 11, and before the fast-curing adhesive is cured. The end surfaces 11a of the two resin plates 11 are quickly brought into contact with each other. Thereby, the two resin plates 11 are temporarily fixed by the fast-curing adhesive.

  Next, the reactive adhesive 13 is poured into the gap between the joint portions of the two temporarily fixed resin plates 11, and the front surface side of the joint portions of the two temporarily fixed resin plates 11 is covered. A plastic film 12 is attached with a reactive adhesive 14. After that, when the predetermined curing time has elapsed and the reactive adhesive 13 is cured, the joint portion of the two resin plates 11 is permanently bonded. Moreover, when the predetermined curing time has elapsed and the reactive adhesive 14 is cured, the plastic film 12 is bonded to the two resin plates 11 so as to cover the joint portion. As a result, the joint strength of the joint is increased, and the bending strength is increased by relaxing the stress concentration on the joint.

  In addition, the plastic film 12 may be affixed not only to the front surface side of a junction part but to a back surface side, and may be affixed on both surfaces side. Since the plastic film 12 is thin, it is possible to suppress the level difference when the plastic film 12 is pasted, and to prevent the appearance from deteriorating without impairing the appearance of the joined component 10.

  Moreover, in the manufacturing method of the said joining component 10, although the end surface 11a of the two resin plates 11 is temporarily fixed and then finally bonded with the reactive adhesive 13, the end surfaces 11a of the two resin plates 11 are not temporarily fixed. May be bonded with the reactive adhesive 13.

  The two resin plates 11 may be thermoplastic resin plates formed by a three-dimensional modeling method.

  In recent Japanese manufacturing sites, the shift to high-value-added products of various types and small lots is accelerating more and more in order to meet the individual needs of the market. Under such circumstances, the area in which 3D modeling methods are actively used in each manufacturing process is expanding, and the use of 3D modeling equipment in the manufacturing industry is rapidly progressing, and an important role that supports manufacturing. Is responsible.

  The three-dimensional modeling method is a modeling method for manufacturing a three-dimensional model by stacking sliced two-dimensional layers one by one based on design data of three-dimensional CAD. Three-dimensional modeling methods include a material extrusion deposition method (FDM method) in which resins melted by heat are stacked, and a powder sintering lamination method (SLS / SLM method) in which a powdered material is irradiated with a laser to be sintered. is there.

  In the three-dimensional modeling method, an increase in size of the three-dimensional model is expected, but the dimension of the model is limited by the specifications of the modeling apparatus. In order to produce a large shaped article by the three-dimensional modeling method, there is a method of joining component parts that are divided and shaped with an adhesive. However, when the end surfaces of the component parts are butted together and bonded, depending on the plate thickness, the bonding area may be small, or sufficient bonding strength may not be obtained at the bonded portion due to distortion of the molded object generated during modeling.

  Since the joining component 10 of the present embodiment is reinforced by attaching the plastic film 12 to the joining portion, sufficient adhesive strength can be obtained.

  The three-dimensional modeling method is not limited to the above-described material extrusion deposition method (FDM method) and powder sintering lamination method (SLS / SLM method), but also a method of modeling by melting using a thermoplastic resin, Any method may be used as long as it is a method of sintering and shaping the material. This three-dimensional modeling method will be described later. The type of thermoplastic resin is not limited, but nylon 6 (registered trademark), nylon 11 (registered trademark), nylon 12 (registered trademark), polybutylene terephthalate, polypropylene, polycarbonate, polyether imide, ABS resin, PLA resin (poly Lactic acid) is generally used.

  Although the thickness limit and accuracy of the resin plate 11 vary depending on the three-dimensional modeling method, the thickness is preferably 0.8 [mm] or more in order to obtain flat modeling without warping. More preferably, the thickness is 2 [mm] or more.

  The type of the plastic film 12 is not limited, but a thin and high-strength material is preferable so that the appearance is not impaired when the plastic film 12 is attached.

  The fast-curing adhesive is an adhesive that is easy to apply, reacts with moisture in the air, and can be quickly cured (temporarily cured) at room temperature because the end surfaces 11a of the two resin plates 11 are brought into contact with each other and temporarily fixed. is there. For example, as the fast-curing adhesive, an adhesive having a main component such as cyanoacrylate adhesive and ethyl α-cyanoacrylate can be used. The thickness of the fast-curing adhesive after curing is preferably 0.01 [mm] or more and 0.5 [mm] or less.

  The reactive adhesives 13 and 14 are obtained by temporarily fixing the end surfaces 11a of the two resin plates 11 with a fast-curing adhesive, and then attaching the plastic film 12 between the gap between the joint portions of the two resin plates 11 and the front surface. It is applied to the area to be bonded, and the bonding portion and the plastic film 12 are permanently bonded. The thickness of the reactive adhesives 13 and 14 after curing is preferably 0.01 [mm] or more and 0.5 [mm] or less.

  Here, as a result of intensive studies by the present inventors, the reactive adhesives 13 and 14 can obtain a higher bending strength of the bonded part 10 as the glass transition temperature after curing is higher, and in particular, the glass transition after curing. It was found that a reactive adhesive having a temperature of 90 [° C.] or higher is more effective.

  Examples of the reactive adhesives 13 and 14 having a glass transition temperature of 90 [° C.] or higher after curing include thermosetting epoxy, ultraviolet curing epoxy, visible light curing epoxy, ultraviolet curing acrylate, thermosetting acrylate, cyanoacrylate, and heat. Selected from cured urethane systems. On the other hand, in the case of an adhesive having a glass transition temperature of less than 90 [° C.], when bending stress is applied to the joined part, the stress is concentrated on the joint, particularly the cross-section, and therefore the joint is easily peeled off. .

  FIG. 2 is a graph showing the relationship between the maximum stress obtained by performing a three-point bending test on the bonded component 10 having the configuration shown in FIG. 1 and the glass transition temperature after curing of the reactive adhesive 14 used for bonding. is there. In the test of FIG. 2, a cyanoacrylate adhesive was used as a fast-curing adhesive that temporarily fixes the joint between the two resin plates 11. In addition, as a reactive adhesive 13 for main bonding the joint portion of the two resin plates 11 and a reactive adhesive 14 for attaching and bonding the plastic film 12 so as to cover the front surface side of the joint portion. The test was conducted using seven types of adhesives having different glass transition temperatures after curing. The test method for the three-point bending test will be described later.

  From the graph of FIG. 2, it can be seen that the glass transition temperature after curing of the reactive adhesive used for bonding the plastic film 12 increases, and the maximum stress (maximum bending stress) of the three-point bending test also increases. In particular, when a reactive adhesive having a glass transition temperature of 90 [° C.] or higher is used, the maximum stress is 40 MPa in any case.

  The plastic film 12 as the reinforcing member may be a fiber reinforced plastic film. The present inventors have studied various reinforcing members, mainly thin film materials, as reinforcing members. In the case of a thin film material, there is almost no difference in thickness between the part where the film material is pasted and the part where the film material is not pasted. There are few restrictions and the appearance is not impaired. As a result of intensive studies by the present inventors, it has been found that a high bending strength can be obtained when a fiber-reinforced plastic film containing fibers is attached as a reinforcing member.

  In particular, by installing and bonding a fiber reinforced plastic film in which the longitudinal direction of the fibers is oriented in one direction in a direction orthogonal to the width direction of the joint portion, a large bending strength can be obtained even in a thin film. In this case, the fiber reinforced plastic film as the reinforcing member has a thickness of about 0.01 [mm] to 0.1 [mm], and sufficient strength can be obtained. That is, if it is a fiber reinforced plastic film of this thickness, a bending strength comparable to or higher than that of the resin plate 11 as a molding base material can be obtained.

  The fiber-reinforced plastic film is sufficient in terms of strength if it is applied to either the front side or the back side so as to cover the joint between the two resin plates 11. However, if a fiber reinforced plastic film is affixed on both sides, a symmetrical structure is obtained, distortion is reduced, and this is suitable for applications that require high reliability.

  Fig.3 (a) is a side view which shows an example of the other joining component 20 which concerns on this embodiment. FIG. 3B is an exploded perspective view of the two resin plates 21 and the plastic film 22 before joining with the adhesive of the joining component 20. In FIG. 3, the joining component 20 has a step shape in which end surfaces 21 a of two resin plates 21 are fitted to each other. And it is the structure which affixed the plastic film 22 so that the front surface side of the junction part of the fitting reinforcement structure which faced | matched the end surface 21a of the two resin plates 21 may be covered. Hereinafter, the structure of the joining component shown in FIG. 3 is also referred to as “fitting reinforcement structure”.

3 can be manufactured by the following manufacturing method, for example.
In an example of the manufacturing method of the joining component 20, first, a fast-curing adhesive is applied in a dot shape to at least one of the plurality of end surfaces 21 a of the two resin plates 21, and before the fast-curing adhesive is cured. The end faces 21a of the two resin plates 21 are quickly brought into contact with each other and fitted together. Thereby, the two resin plates 21 are temporarily fixed by the fast-curing adhesive.

  Next, the reactive adhesive 13 is poured into the gap between the joint portions of the two temporarily fixed resin plates 21 and the joint portions of the two temporarily fixed resin plates 21 are fitted. A plastic film 22 is attached with a reactive adhesive 24 so as to cover the surface side. After that, when the predetermined curing time elapses and the reactive adhesive 23 is cured, the joint portion in which the two resin plates 21 are fitted is finally bonded. When the reaction adhesive 24 is cured after a predetermined curing time has elapsed, the plastic film 22 adheres to the two resin plates 21 so as to cover the joints fitted together. As a result, the joint strength of the joint is increased, and the bending strength is increased by relaxing the stress concentration on the joint.

  In the manufacturing method of the joining component 20, the end surfaces 21a of the two resin plates 21 are temporarily fixed and then permanently bonded with the reactive adhesive 23. However, the end surfaces 21a of the two resin plates 21 are not temporarily fixed. May be bonded with the reactive adhesive 23.

  In the joining component 20 shown in FIG. 3, since the end surfaces 21a of the two resin plates 21 are stepped to fit each other, the bonding area of the end surfaces 21a bonded to each other can be increased, and the bonding strength can be improved. Can do. As a result, even greater bending strength can be obtained at the joint portion of the joint component 20.

  Since the adhesive strength of the resin plate depends on the adhesive area of the joint, the higher the adhesive area, the higher the adhesive strength. In order to obtain high bonding strength, it is effective to increase the bonding area (flat part area) of the end face of the resin plate, but there are cases where the bonding area cannot be widened by design. Even in such a case, if the structure shown in FIG. 3 is used, the bonding area can be widened and high bonding strength can be obtained. For example, in the structure shown in FIG. 1, when the thickness of the resin plate 11 is thin and the bonding area of the end surface 11a is small and the bonding strength is weak, the end surface 21a of the resin plate 21 is bonded by forming a step shape as shown in FIG. The adhesive strength can be improved by widening the area.

  FIG. 4A is a side view showing an example of still another joining component 30 according to the present embodiment. FIG. 4B is an exploded perspective view of the two resin plates 31 and the plastic film 32 before being joined with the adhesive of the joining component 30. In FIG. 4, the joining component 30 has a step portion 31 b formed on the end surfaces of two resin plates 31, and a plastic film so as to cover the step portion 31 b of the joining portion that abuts the end surfaces 31 a of the two resin plates 31. 32 is embedded.

  In FIG. 4B, the plastic film 32 has a shape of thickness t, length L, and width W. In addition, step portions 31b having a depth D, a depth length S, and a width W are formed on the end surfaces of the two resin plates 31, respectively. For example, the depth D of the step portion 31b = the thickness t of the plastic film 32, the depth length S of the step portion 31b = (the length L of the plastic film 32) × 0.98 / 2, and the width W of the step portion 31b = plastic. The film 32 may have a width W relationship. As a result, the plastic film 32 is embedded in the stepped portion 31b at the joint where the two resin plates 31 are abutted, and an excellent appearance can be obtained without any gaps or steps.

  Hereinafter, the structure of the joining component shown in FIG. 4 is also referred to as “reinforcing member embedded structure”. In this reinforcing member embedding structure, the plastic film 32 as the reinforcing member is embedded in the stepped portion 31b so as to be flush with the surface of the joint portion, so that the reinforcing member may be a thin plate shape.

The joining component 30 shown in FIG. 4 can be manufactured by the following manufacturing method, for example.
In an example of the manufacturing method of the joining component 10, first, a fast-curing adhesive is applied in a dot shape to at least one of the plurality of end surfaces 31 a of the two resin plates 31, and before the fast-curing adhesive is cured. The end surfaces 31a of the two resin plates 31 are quickly brought into contact with each other. Thereby, the two resin plates 31 are temporarily fixed by the fast-curing adhesive.

  Next, the reactive adhesive 33 is poured into the gap between the joint portions of the two temporarily fixed resin plates 31, and the front surface side of the step portion 31 b of the joint portion of the two temporarily fixed resin plates 31. A plastic film 32 is embedded so as to cover the surface, and is attached with a reactive adhesive 34. Thereafter, when the predetermined curing time has elapsed and the reactive adhesive 33 is cured, the joint portion of the two resin plates 31 is permanently bonded. When the predetermined curing time has elapsed and the reactive adhesive 34 has been cured, the plastic film 32 adheres to the two resin plates 31 so as to cover the stepped portion 31b of the joint. As a result, the joint strength of the joint is increased, and the bending strength is increased by relaxing the stress concentration on the joint.

  In addition, in the manufacturing method of the said joining component 30, although the end surface 31a and the level | step-difference part 31b of the two resin plates 31 are temporarily fixed, and finally this is bonded by the reactive adhesive 33, two resin plates are not temporarily fixed. The end surface 31 a and the stepped portion 31 b of 31 may be bonded with the reactive adhesive 33.

  In the joining component 30 shown in FIG. 4, since the plastic film 32 is embedded and attached to the step portion 31 b of the two resin plates 21, the step of the plastic film 32 does not occur. Thereby, a more excellent appearance can be obtained. In addition, the design limitation due to the level difference of the plastic film 32 can be relaxed. Furthermore, a greater bending strength can be obtained at the joint portion of the joint component 30.

  In the bonding of the resin plates, the larger the reinforcing member, the larger the bonding area with the resin plate, so that a high bonding strength can be obtained. Thus, in order to obtain high adhesive strength, it is effective to enlarge the reinforcing member. However, a step due to the reinforcing member is widely generated on the surface of the resin plate at the connection portion, and thus there are design restrictions. There is.

  In the structure shown in FIG. 4, the plastic film 32 is embedded in the step portion 31 b of the resin plate 31, and the step of the plastic film 32 does not occur on the surface of the resin plate 31, so that a large plastic film 32 can be used. In particular, the length L of the plastic film 32 can be increased.

  Hereinafter, examples of the joining component according to the present embodiment will be described. However, the present invention is not limited to these examples.

  First, a three-dimensional modeling apparatus for modeling a thermoplastic resin plate used in each example by three-dimensional modeling will be described. While the three-dimensional modeling apparatus is based on a lamination method in which thin layers are stacked, there are several types of modeling methods, and the characteristics of materials and modeling objects that can be used differ depending on the method. For example, the material extrusion deposition method (FEM method) that stacks the resin melted by heat is capable of forming ABS, PLA, polycarbonate, etc., and it is easy to obtain high durability and heat resistance. Suitable for mold shaping. In addition, the powder sintering additive manufacturing method (SLS / SLM method) in which a powdery material is irradiated with a laser to sinter can be used not only for resins such as nylon (registered trademark) and polypropylene, but also for metal modeling. It is also used in the manufacture of final products and molds. Recently, it has been expanded to various uses due to diversification of modeling methods and materials.

  In this embodiment, since a material extrusion deposition method (FDM method) three-dimensional modeling apparatus and a powder sintering additive manufacturing method (SLS method) three-dimensional modeling apparatus are used, these three-dimensional modeling apparatuses will be described.

[FDM 3D modeling equipment]
FIG. 5 is a block diagram illustrating a schematic configuration of the FDM type three-dimensional modeling apparatus 1. FIG. 6 is an explanatory view schematically showing details of the FDM type three-dimensional modeling apparatus 1.

[Overall description]
The FDM type three-dimensional modeling apparatus 1 mainly includes a material supply unit 100, a three-dimensional modeling unit 200, a driving unit 300, and a control unit 400. In the three-dimensional modeling apparatus 1, each unit is driven by the driving unit 300 under the control of the control unit 400, and a three-dimensional modeled object 200 is modeled by using the material supplied from the material supply unit 100. .

[Material supply section]
The material supply unit 100 includes at least a modeling head 110 as a material discharge member, and a filament supply unit 120 that supplies a filament as a modeling material to the modeling head 110. The filament is an elongated wire-shaped solid, is set in the three-dimensional modeling apparatus 1 in a wound state, and is supplied to the nozzle 111 on the modeling head 110 by the filament supply unit 120. The filament supplied by the filament supply unit 120 is heated and melted by the modeling head 110, and the filament in the molten state is pushed out from the nozzle 111 by inserting the filament in the solid state from behind.

  The material pushed out from the nozzle 111 on the modeling head 110 includes not only a modeling material constituting the three-dimensional modeled object but also a support material that does not constitute the three-dimensional modeled object. This support material is usually formed of a material different from the modeling material (filament) constituting the three-dimensional modeled object, and finally removed from the three-dimensional modeled object formed of the filament. This support material is also heated and melted by the modeling head 110, and the support material in the molten state is pushed out from the nozzle 111 by inserting the filament of the solid support material from behind.

[3D modeling department]
The three-dimensional modeling unit 200 includes at least a placement unit 210, a chamber 220, and a heating unit 230. The interior of the chamber 220 in the three-dimensional modeling unit 200 is a processing space for modeling a three-dimensional modeled object. The melted filaments extruded from the modeling head 110 in the material supply unit 100 are supplied onto the stage of the placement unit 210 inside the chamber 220 heated by the heating unit 230 and are sequentially stacked in layers.

[Drive part]
The drive unit 300 includes at least an X-axis drive mechanism 310, a Y-axis drive mechanism 320, and a Z-axis drive mechanism 330. The driving unit 300 relatively moves the modeling head 110 of the material supply unit 100 and the stage of the mounting unit 210 in the three-dimensional modeling unit 200 by using these driving mechanisms 310, 320, and 330. Thereby, the filament extruded from the modeling head 110 of the material supply part 100 is supplied to the target position on a stage.

[SLS 3D modeling equipment]
FIG. 7 is a block diagram showing a schematic configuration of the SLS type three-dimensional modeling apparatus 5. FIG. 8 is an explanatory diagram schematically showing details of the SLS type three-dimensional modeling apparatus 5.

[Overall description]
The SLS type three-dimensional modeling apparatus 5 mainly includes a material supply unit 500, a laser irradiation unit 600, a three-dimensional modeling unit 700, a drive unit 800, and a control unit 900. In the three-dimensional modeling apparatus 5, using the material supplied from the material supply unit 500 by driving each piston and the like by the drive unit 800 while irradiating the laser with the laser irradiation unit 600 under the control of the control unit 900. A 3D modeling object 700 is modeled by the 3D modeling unit 700.

[Material supply section]
The material supply unit 500 includes at least a material supply piston 510, a recoater 520 for uniformly spreading a powder material on the three-dimensional modeling unit 700, and a heating unit 530 for heating the material. The recoater 520 is actuated while the material supply piston 510 is raised to supply the material to the three-dimensional modeling unit 700, and the material is uniformly spread on the three-dimensional modeling unit 700. As the material, for example, a resin material such as nylon (registered trademark) powder or a metal material such as metal powder can be used. In the case of a resin material, unlike the FDM method, a support material is unnecessary.

[Laser irradiation part]
The laser irradiation unit 600 includes at least a CO ₂ laser 610 and a digital galvanometer mirror 620. The CO ₂ laser CO ₂ laser light emitted from the 610 scans the digital galvanometer mirror 620, is irradiated to the material of the three-dimensional modeling unit 700.

[3D modeling department]
The three-dimensional modeling unit 700 includes at least a modeling piston 710 and a heating unit 720. The material of the three-dimensional modeling unit 700 is modeled by CO ₂ laser light irradiated from the laser irradiation unit 600, and the modeling piston 710 is lowered to be sequentially layered.

  The material supply unit 500, the digital galvanometer mirror 620, and the three-dimensional modeling unit 700 are arranged in a nitrogen gas atmosphere chamber.

[Drive part]
The drive unit 800 includes at least a material supply piston drive mechanism 810 and a modeling piston drive mechanism 820. The drive unit 800 moves the material supply piston 510 of the material supply unit 500 and the modeling piston 710 of the three-dimensional modeling unit 700 by using these drive mechanisms 810 and 820. The modeling piston 710 descends and the material supply piston 510 ascends in accordance with the operation in which the three-dimensional modeling unit 700 sequentially laminates in a layered manner to model the three-dimensional modeled object, and the material supply piston 510 rises to three-dimensional modeling the necessary amount of material. Part 700.

Next, the joining shape and joining method used in each example will be described in detail.
[Joint shape used in Examples]
The resin plate is set to have a length of 80 [mm] when two thermoplastic shaped articles having the same shape and the same dimensions are bonded and bonded, the width is 10 [mm], and the thickness is 4 [mm]. did. The detailed dimensions of each structure are as follows.

  In the joining component 10 having the butted reinforcement structure shown in FIG. 1, the dimensions of the thermoplastic resin plate are 40 [mm] in length, 10 [mm] in width, and 4 [mm] in thickness. The dimensions of the sheet-shaped reinforcing member were 20 [mm] in length, 10 [mm] in width, and 50 [μm] in thickness.

  3, the dimensions of the thermoplastic resin plate are 50 [mm], 10 [mm] wide and 4 [mm] thick, and the stepped portion has a length of 20 [mm]. [Mm] and thickness 2 [mm]. The dimensions of the sheet-shaped reinforcing member were 20 [mm] in length, 10 [mm] in width, and 50 [μm] in thickness.

  In the joining component 30 having the reinforcing member embedded structure shown in FIG. 4, the thermoplastic resin plate has a length of 40 [mm], a width of 10 [mm], a thickness of 4 [mm], and the stepped portion has a length of 10 [mm]. mm] and a depth of 1 [mm]. The dimensions of the sheet-shaped reinforcing member were a length of 19.6 [mm], a width of 10 [mm], and a thickness of 1 [mm].

[Joint method]
A method for joining the reinforcing structures shown in FIGS.
Table 1 shows the configuration of the three-dimensional structure that is adhesively bonded, obtained in each of the following examples, and the three-point bending test and the evaluation results of the appearance of these.

  First, a thermoplastic resin plate was obtained by the three-dimensional modeling method shown in Table 1. Next, a cyanoacrylate-based adhesive is applied as a fast-curing adhesive to the joint surfaces of two identically-shaped thermoplastic resin plates, and abutted to have the structure shown in FIGS. Temporarily fixed. Next, a reactive adhesive having a glass transition temperature after curing of 90 [° C.] or higher was poured into the gap between the temporarily fixed joint surfaces to perform main bonding. Next, the sheet-shaped reinforcing member was fixed with a main-bonding adhesive on one or both sides so as to cover the joint.

[Example 1]
A three-dimensional shaped part for an abutting reinforcement structure shown in FIG. 1 was obtained by using an ABS (Acrylonitrile Butadiene Styrene) material using an FDM method (Stratasys, Fortus 900mc). The end face of the butting portion was temporarily fixed with a cyanoacrylate adhesive (Aron 403TN, manufactured by Toagosei Co., Ltd.). On one side of the joint, an FRP film (manufactured by Kurashiki Spinning Co., Ltd., Kura Power Sheet, thickness 0.07 [mm]) is installed as a sheet-shaped reinforcing member so that the fiber orientation direction is perpendicular to the joint width direction. did. For fixing the FRP film, a cyanoacrylate adhesive (manufactured by Toagosei Co., Ltd., Aron 403TN, glass transition temperature 140 [° C.]) was used in the same manner as temporary fixing, and the three-dimensional shaped joined part of Example 1 was produced. .

[Example 2]
A PA12 (Polyamide 12) material was obtained by using the SLS method (manufactured by RICOH, AM S5500P) to obtain a three-dimensional shaped part for abutting reinforcement structure shown in FIG. The end face of the abutting part was temporarily fixed with a cyanoacrylate adhesive (manufactured by Three Bond Co., 1783). On one side of the joint, an FRP film (manufactured by Kurashiki Spinning Co., Ltd., Kura Power Sheet, thickness 0.07 [mm]) is installed as a sheet-shaped reinforcing member so that the fiber orientation direction is perpendicular to the joint width direction. did. A thermosetting epoxy adhesive (manufactured by ThreeBond, 2204, glass transition temperature 109 [° C.]) was used for the main bonding of the end face of the abutting portion and the fixing of the FRP film, and the three-dimensional shaped joining component of Example 2 was produced. .

Example 3
Using a PDM (Poly Ether Imide) material, FDM method (manufactured by Stratasys, Fortus 900mc), a three-dimensional shaped part for a fitting reinforcement structure shown in FIG. 3 was obtained. The end face of the butting portion was temporarily fixed with a cyanoacrylate adhesive (Aron 403TN, manufactured by Toagosei Co., Ltd.). LCP film (Pericule LCP, manufactured by Chiyoda Integre Co., Ltd., thickness 0.025 [mm]) as a sheet-shaped reinforcing member is installed on one side of the joint so that the resin orientation direction is perpendicular to the joint width direction. did. A UV-curing epoxy adhesive (manufactured by ThreeBond, 2082E, glass transition temperature 93 [° C.]) is used for the main bonding of the end face of the abutting portion and the fixing of the LCP film, and the three-dimensional shaped joining component of Example 3 is produced. did.

Example 4
The PEI material was obtained by using the FDM method (manufactured by Stratasys, Fortus 900mc) to obtain a three-dimensional shaped part for a fitting reinforcement structure shown in FIG. The end face of the butting portion was temporarily fixed with a cyanoacrylate adhesive (Aron 403TN, manufactured by Toagosei Co., Ltd.). On one side of the joint, an FRP film (manufactured by Kurashiki Spinning Co., Ltd., Kura Power Sheet, thickness 0.07 [mm]) is installed as a sheet-shaped reinforcing member so that the fiber orientation direction is perpendicular to the joint width direction. did. A thermosetting epoxy adhesive (manufactured by ThreeBond Co., Ltd., 2204, glass transition temperature 109 [° C.]) is used for the final adhesion of the abutting portion end face and the fixing of the FRP film, and the three-dimensional shaped joining component of Example 4 is produced. did.

Example 5
The ABS material was obtained by using the FDM method (Stratasys, Fortus 900mc) to obtain a three-dimensional shaped part for the reinforcing member embedded structure shown in FIG. The end face of the abutting part was temporarily fixed with a cyanoacrylate adhesive (manufactured by Three Bond Co., 1783). A UV-cured FRP film (manufactured by Sanko Techno Co., Ltd., e-sheet quick, thickness 1 [mm]) was embedded as a sheet-shaped reinforcing member in the joint step portion. A three-dimensional shaped joining component of Example 5 was used for the main bonding of the end face of the abutting portion and the fixing of the UV curable FRP film using a UV curable epoxy adhesive (manufactured by ThreeBond, 2082E, glass transition temperature 93 [° C.]). Was made.

Example 6
The PA12 material was obtained by using the SLS method (manufactured by RICOH, AM S5500P) to obtain a three-dimensional shaped part for the reinforcing member embedded structure shown in FIG. The end face of the butting portion was temporarily fixed with a cyanoacrylate adhesive (Aron 403TN, manufactured by Toagosei Co., Ltd.). A PA12 sheet was embedded as a sheet-shaped reinforcing member shaped in the same manner as the adherend (three-dimensional shaped part) in the joining step portion. A UV curable epoxy adhesive (manufactured by Kyoritsu Chemical Industry Co., Ltd., XS-EHL105, glass transition temperature 160 [° C.]) was used for the main adhesion of the end face of the abutting portion and the fixing of the PA12 sheet. A shaped joint part was produced.

Example 7
A three-dimensional shaped part for an abutting reinforcement structure shown in FIG. 1 was obtained by using an ABS (Acrylonitrile Butadiene Styrene) material using an FDM method (Stratasys, Fortus 900mc). The abutting part is not temporarily fixed, and an FRP film (Kurakibo Co., Ltd., Kura Power Sheet, thickness 0.07 [mm]) is joined as a sheet-shaped reinforcing member on one side of the joining part in the fiber orientation direction. It was installed so as to be orthogonal to the width direction. For fixing the FRP film, a cyanoacrylate-based adhesive (manufactured by Toagosei Co., Ltd., Aron 403TN, glass transition temperature 140 [° C.]) was used, and a three-dimensional shaped joined part of Example 7 was produced.

Example 8
The ABS material was obtained by using the FDM method (Stratasys, Fortus 900mc) to obtain a three-dimensional shaped part for the butted reinforcement structure shown in FIG. The end face of the butting portion was temporarily fixed with a cyanoacrylate adhesive (Aron 403TN, manufactured by Toagosei Co., Ltd.). On one side of the joint, an FRP film (manufactured by Kurashiki Spinning Co., Ltd., Kura Power Sheet, thickness 0.07 [mm]) is installed as a sheet-shaped reinforcing member so that the fiber orientation direction is perpendicular to the joint width direction. did. A cyanoacrylate adhesive (802, manufactured by Toagosei Co., Ltd., glass transition temperature 80 [° C.]) is used for the main bonding of the end face of the abutting portion and the fixing of the FRP film. Produced.

Example 9
The ABS material was obtained by using the FDM method (Stratasys, Fortus 900mc) to obtain a three-dimensional shaped part for the butted reinforcement structure shown in FIG. The end face of the abutting part was temporarily fixed with a cyanoacrylate adhesive (manufactured by Three Bond Co., 1783). LCP film (Pericule LCP, manufactured by Chiyoda Integre Co., Ltd., thickness 0.025 [mm]) as a sheet-shaped reinforcing member is installed on one side of the joint so that the resin orientation direction is perpendicular to the joint width direction. did. A two-component fast curing epoxy adhesive (manufactured by ThreeBond Co., Ltd., 2086M, glass transition temperature 45 [° C.]) is used for the main adhesion of the abutting portion end face and the fixing of the LCP film. Was made.

Example 10
The PA12 material was obtained by using the SLS method (manufactured by RICOH, AM S5500P) to obtain a three-dimensional shaped part for the fitting reinforcement structure shown in FIG. The end face of the butting portion was temporarily fixed with a cyanoacrylate adhesive (Aron 403TN, manufactured by Toagosei Co., Ltd.). On one side of the joint, an FRP film (manufactured by Kurashiki Spinning Co., Ltd., Kura Power Sheet, thickness 0.07 [mm]) is installed as a sheet-shaped reinforcing member so that the fiber orientation direction is perpendicular to the joint width direction. did. Visible light curing epoxy adhesive (manufactured by Autex, EXTG-2010-A, glass transition temperature 85 [° C.]) was used for main adhesion of the abutting portion end face and fixing of the FRP film. A dimensionally shaped bonded part was produced.

Example 11
A three-dimensional shaped part for a reinforcing member embedded structure shown in FIG. 4 was obtained by using an FDM method (Stratasys, Fortus 900mc) for the PEI material. The end face of the abutting part was temporarily fixed with a cyanoacrylate adhesive (manufactured by Three Bond Co., 1783). A UV-cured FRP film (manufactured by Sanko Techno Co., Ltd., e-sheet quick, thickness 1 [mm]) was embedded as a sheet-shaped reinforcing member in the joint step portion. A thermosetting epoxy adhesive (manufactured by ThreeBond Co., Ltd., 2087, glass transition temperature 72 [° C.]) is used for the main bonding of the end face of the abutting portion and the fixing of the UV curable FRP film. Was made.

Example 12
The PA12 material was obtained by using the SLS method (manufactured by RICOH, AM S5500P) to obtain a three-dimensional shaped part for the reinforcing member embedded structure shown in FIG. The end face of the butting portion was temporarily fixed with a cyanoacrylate adhesive (Aron 403TN, manufactured by Toagosei Co., Ltd.). A PA12 sheet was embedded as a sheet-shaped reinforcing member shaped in the same manner as the adherend (three-dimensional shaped part) in the joining step portion. A two-component fast curing epoxy adhesive (manufactured by ThreeBond Co., Ltd., 2086M, glass transition temperature 45 [° C.]) is used for the main adhesion of the butting portion end face and the PA12 sheet. Was made.

  Each of the following characteristics was evaluated for the adhesively bonded three-dimensional structure obtained in each of the above examples.

[3-point bending test]
A universal testing machine (manufactured by Shimadzu Corporation, AG-X) was used for the three-point bending test. The distance between supporting points for supporting the three-dimensional structure bonded and bonded was 64 [mm], and the test speed was 10 [mm / min]. The radius of the indenter was 5 [mm]. When a plastic film reinforcing member (reinforcing sheet) was attached to only one surface, the reinforcing sheet surface was set downward and the center portion was pushed in from above with an indenter. In the test, a deflection-load curve was obtained, and the maximum stress was determined from the maximum load. In this determination method, in the three-dimensional shaped part bonded and bonded, the three-point bending test having a maximum stress of 40 [MPa] or more was evaluated as “◯”, and the others were determined as “X”.

[Surface property evaluation]
A surface roughness measuring machine (manufactured by ACCRETEC, 1400D) was used for measurement of appearance as surface properties. The height of the step was measured by scanning the needle so as to hang over the step formed by the butted joint and the sheet-shaped reinforcing member (reinforcing sheet, reinforcing film). In this determination method, in a three-dimensional shaped part bonded and bonded, a case where the level difference of the bonded portion is 0.5 [mm] or less is set as “◯”, and the others are set as “X”.

[Workability evaluation]
In terms of workability, “○” indicates that the two resin plates are attached to each other, and the reinforcing member is attached with an adhesive to reinforce, and “x” indicates the others.

  As shown in Table 1, regarding the bending stress, the adhesively bonded three-dimensional shaped parts of Examples 1 to 7 satisfy the criterion of maximum bending stress of 40 [MPa] or more, but the adhesive bonding of Examples 8 to 12 The three-dimensional shaped part that was made is not satisfied. Moreover, about the external appearance, the level | step difference of the junction part has satisfy | filled the criteria with which the level | step difference of a junction part is 0.5 [mm] or less in the three-dimensional shaping | molding components adhesive-bonded of Examples 1-12. Moreover, about workability | operativity, although the three-dimensional modeling parts of Examples 1-6 and 8-12 satisfy | fill the criterion, the three-dimensional modeling part of Example 7 which is not temporarily fixed does not satisfy the criterion.

What was demonstrated above is an example, and there exists an effect peculiar for every following aspect.
(Aspect A)
Plate-like joined parts 10, 20, and 30 formed by joining resin plates such as a plurality of resin plates 11, 21, and 31, and adjacent end surfaces 11a, 21a, and 31a of the plurality of resin plates are bonded. The plastic film 12, 22, 32 is joined to each other by the agent, and the joint part where the end faces of the plurality of resin boards are joined to each other covers the joint part from at least one of the front side and the back side of the resin board. It is reinforced with a sheet-like or thin plate-like reinforcing member such as.
According to this, as described in the above embodiment, the adjacent end surfaces of the plurality of resin plates are bonded with the adhesive, and the bonded portions are reinforced with the reinforcing member, whereby the end surfaces of the resin plates are bonded to each other. Compared to the case where there is a gap (gap) between the end faces without being joined with the agent, stress concentration at the joint when the joined part is bent is less likely to occur, and high bending strength can be ensured.
Furthermore, the difference in elastic properties between the adhesive portion and the surrounding resin plate at the joint is reduced, and the gap between the end surfaces of the resin plates is not bonded by the adhesive and there is a gap (gap) between the end surfaces. Compared to the above, when the joined part is bent, the whole joined part bends more uniformly, and bending at the joined part is less likely to occur. Therefore, stress concentration on the reinforcing member that reinforces the joined part is suppressed. can do.
Moreover, since the reinforcing member that reinforces the joining portion is a thin reinforcing member having a sheet shape or a thin plate shape, the step at the edge of the reinforcing member can be kept low, so the joining portion by attaching the reinforcing member It is possible to prevent deterioration of the appearance.
As described above, it is possible to prevent the deterioration of the appearance of the joining member while suppressing the stress concentration on the reinforcing member that reinforces the joining part of the joining component and securing the high bending strength of the joining component.
(Aspect B)
In the above aspect A, the adhesive used for joining the end faces of the resin plate is the reactive adhesives 14, 24, and 34 having a glass transition temperature after curing of 90 [° C.] or higher.
According to this, as described in Examples 1 to 7 of the above-described embodiment, the maximum bending stress is 40 [by joining the end faces of the resin plate with the adhesive having the predetermined glass transition temperature after curing. MPa] or higher bending strength can be ensured. Further, by sticking the reinforcing member with an adhesive having a glass transition temperature after the above-mentioned predetermined curing, bending at the joint portion is less likely to occur.
(Aspect C)
In the above aspect A or aspect B, the joint portion of the resin plate is temporarily fixed with a fast-curing adhesive such as a cyanoacrylate adhesive before joining with an adhesive such as the reactive adhesives 13, 23, and 33. Yes.
According to this, as explained in Examples 1 to 6 and 8 to 12 of the above embodiment, it is possible to improve workability at the time of bonding for attaching the reinforcing member.
(Aspect D)
In any one of the above aspects A to C, the reinforcing member is a resin film such as a plastic film 12, 22, or 32.
According to this, as described in Examples 1 to 12 of the above-described embodiment, the level difference of the joint portion can be further suppressed, so that deterioration in appearance can be more reliably prevented. Moreover, since the level | step difference of a junction part can be suppressed, the freedom degree in design can be improved.
(Aspect E)
In the above aspect C, the resin film is a fiber-reinforced plastic film.
According to this, as described in Examples 1, 2, 4, 5, 7, 8, 10, and 11 of the above embodiment, the reinforcing member can be made thinner while enhancing the function of reinforcing the joint. For this reason, it is possible to more reliably prevent deterioration in appearance while ensuring high bending strength.
(Aspect F)
In any one of the above aspects A to E, a fitting portion including a plurality of end faces 21a that can be fitted to each other is formed on end faces of the resin plates that are joined to each other.
According to this, as described in Examples 3, 4, and 10 of the above-described embodiment, the joint area at the joint is increased, and higher bending strength is obtained. Moreover, since it becomes difficult to produce a level | step difference in a junction part, deterioration of an external appearance property can be prevented more reliably.
(Aspect G)
In any one of the above-described aspects A to F, a step portion including a plurality of end surfaces 31a into which the reinforcing member can be fitted is formed at the end portion of the resin plate on the side of the joint portion to be joined.
According to this, as described in Examples 5, 6, 11, and 12 of the above embodiment, the reinforcing member is fitted into the step portion formed at the end portion of the resin plate on the joint portion side to be joined to each other. As a result, it is difficult for a step to occur at the joint, and thus deterioration of the appearance can be more reliably prevented.
(Aspect H)
A method for manufacturing plate-like joining parts 10, 20, and 30 formed by joining resin plates such as a plurality of resin plates 11, 21, and 31, wherein the adjacent end surfaces of the plurality of resin plates are bonded with an adhesive. In the joining step of the plurality of resin plates, the sheet-shaped or thin-plate shaped plastic films 12, 22, 32, etc. so as to cover the joining portion from at least one of the front side and the back side of the resin plate Reinforcing with a reinforcing member.
According to this, as described in Examples 1 to 12 of the above embodiment, while suppressing the stress concentration on the reinforcing member that reinforces the joint portion of the joined part, while ensuring high bending strength of the joined part, Deterioration of the appearance of the joining member can be prevented.
(Aspect I)
In the above aspect H, the adhesive used for joining the resin plates is the reactive adhesives 14, 24, and 34 having a glass transition temperature after curing of 90 [° C.] or higher.
According to this, as described in Examples 1 to 7 of the above embodiment, the stress concentration at the joint portion when the joint component is bent is further less likely to occur, and the bending at the joint portion is further generated. It becomes difficult.
(Aspect J)
In the above aspect H or aspect I, the step of temporarily fixing the bonding portion of the resin plate with a fast-curing adhesive before bonding with the adhesive, and a plurality of pieces that can be fitted to each other on the end surfaces to be bonded to each other of the resin plate At least one of a step of forming a fitting portion made of the end surface 21a and a step portion made of a plurality of end surfaces 31a capable of fitting a reinforcing member at an end portion of the resin plate to be joined to each other. It further includes one step.
According to this, as described in Examples 1 to 6 and 8 to 12 of the above embodiment, the reinforcing member is affixed by temporarily fixing the joining portion of the resin plate with the fast-curing adhesive before joining. Workability at the time of bonding can be improved. In addition, as described in Examples 3, 4, and 10 of the above-described embodiment, by forming the fitting portion on the end surfaces of the resin plates that are joined to each other, the joint area at the joint is increased, and higher bending strength is achieved. Is obtained. Moreover, since it becomes difficult to produce a level | step difference in a junction part, deterioration of an external appearance property can be prevented more reliably. In addition, as described in Examples 5, 6, 11, and 12 of the above-described embodiment, the reinforcing members are fitted into the step portions formed at the end portions of the resin plates that are joined to each other. Since it becomes difficult for a level difference to occur in the portion, it is possible to more reliably prevent deterioration in appearance.

DESCRIPTION OF SYMBOLS 1 Three-dimensional modeling apparatus of material extrusion deposition method (FDM system) 5 Three-dimensional modeling apparatus of powder sintering lamination method (SLS system) 10, 20, 30 Joining parts 11, 21, 31 Resin plate 11a End surface 21a Fitting part ( End face)
31a End surface 31b Step portion 12, 22, 32 Plastic film 13, 23, 33 Reactive adhesive (or reactive adhesive and fast-curing adhesive)
14, 24, 34 Reactive adhesive

JP 2013-253643 A

Claims (10)

A plate-like joining component formed by joining a plurality of resin plates,
Adjacent end faces of the plurality of resin plates are bonded together with an adhesive,
The joint portion where the end faces of the plurality of resin plates are joined to each other is reinforced with a sheet-like or thin plate-like reinforcing member so as to cover the joint portion from at least one of the front side and the back side of the resin plate. Joined parts characterized by being made. The joined component of claim 1,
The adhesive used for joining the end faces of the resin plate is a reactive adhesive having a glass transition temperature after curing of 90 [° C.] or higher. The joined component according to claim 1 or 2,
The joining part of the said resin board is temporarily fixed with the quick-curing-type adhesive agent before joining by the said adhesive agent. In the joining component according to any one of claims 1 to 3,
The joining component, wherein the reinforcing member is a resin film. The joined component of claim 4,
The joining part, wherein the resin film is a fiber reinforced plastic film. In the joining component in any one of Claims 1 thru | or 5,
A joining part characterized in that fitting portions that can be fitted to each other are formed on end surfaces of the resin plates that are joined to each other. In the joining component in any one of Claims 1 thru | or 6,
A joined part in which a stepped part capable of fitting the reinforcing member is formed at an end of the resin plate on the side of the joined part to be joined. A method of manufacturing a plate-like joint component formed by joining a plurality of resin plates,
Joining adjacent end faces of the plurality of resin plates with an adhesive;
Reinforced with a sheet-shaped or thin plate-shaped reinforcing member so as to cover the joint from at least one of the front side and the back side of the resin plate at the joint where the end surfaces of the plurality of resin plates are joined to each other And a step of manufacturing the joined part. In the manufacturing method of the joining components of Claim 8,
The adhesive used for joining the resin plates is a reactive adhesive having a glass transition temperature after curing of 90 [° C.] or higher. In the manufacturing method of the joining components of Claim 8 or 9,
Temporarily fixing the joint portion of the resin plate with a fast-curing adhesive before joining with the adhesive, and forming fitting portions that can be fitted to each other on end surfaces of the resin plate that are joined to each other And at least one step of forming a stepped portion into which the reinforcing member can be fitted at an end of the resin plate on the side of the joint portion to be joined to each other. .

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